I don't know, never used a lens with USM... all my lenses use the micro motor so its noisy to me. Almost sounds like zooming with my point and shoot camera except faster.
I have been stalking the ones where the lens is about $235ish the absolute lowest I saw was $215 but they were looking for cash in real life I guess.
The 28-135 is quiet compared to my EF-S 18-55 II. The only noise I really notice is a slight shift sound when AFing and the IS on the 28-135 giving a soft whir when it's on. (btw, anyone know if the tamron 17-50 louder than the 18-55? If it's about the same sound, I can definitely live with it)
I think we can possibly work out a deal. I don't have the lens on me right now (my friend and I swapped lens), but I should have it by next week. I'll post pictures of it and if you're interested, I think I could spare a few bucks to help out a fellow photo soompier

My Tamron 17-50 purchase is pending right now, so when it goes through, I'll let you know for sure that it's available.
^ The noise is only an issue at high ISO and even then I think its more the body you're using than the lense itself.
Ideal? I would say its the 24-70L for full frame. I only myself got this lense recently when I upgraded my body. It's truly an amazing lense and I don't think anyone would beg to differ. I say for full frame because on a crop, its not wide enough for a lot use cases. For a crop, its definitely the 17-55 (which I still have). You get the wide end, it performs like an L, and it has IS. The downside? The build quality is so so and its EF-S mount. If you never ever intend to go full frame, to me the 17-55 is a must for crop bodies if you can afford it. Even if you decide to go ff, you can always sell it as well. However, from my personal experiences, its hard to sell this lense for as much markup as most lenses because end of the day it isn't a L (but costs L) and its EF-S. But YMMV. Some people with crops still opt for the 24-70L but its too narrow for my tastes.
Not that I really spent any effort to try to sell my 28-135 but I should. Thing just collects dust since the day I bought my 40D which was around 1.5 years ago. I used it maybe 1 week. It's practically new.
I personally like to shoot with two bodies when I go on my "photo shooting day trips" as I want to cover all ranges and detest changing lenses outdoor. If I'm shooting primarily on the long end with my 70-200, I mount it on my 5dii and mount the 17-55 on my 40d. The 24's are not wide enough on the 40d. If I'm shooting primarily on the wide end, I mount the 24-70L or 24-105L on my mdii and mount the 70-200 on my 40d. The crop factor on the 70-200 also helps great with long zooms. It's a good combination for my needs. I was originally going to sell my 17-55 but I found it very useful for the purpose I mentioned.
baller!
I was thinking about purchasing a used 17-55 for $750 that included a hood and a filter, which is a bargain... but couldn't justify the $ spent. Those EF-S lens just don't have the same keeper rate as EF lenses do they? It's unfortunate because the photos it produces are better than a lot of L's on crop bodies!
Photography is only a hobby of mine right now, and it's already eaten up a good amount of my cash, so spending anything over $500 right now doesn't make sense to me unless I find a way to make some side cash.
I bought a Wild & Scenery of Illinois book from Borders to give me some ideas on how and what to shoot when I have a dedicated full day.
Unfortunately, even if I get good enough to be published, I don't think I could make enough money to fund my hobby; that book was discounted to $3.99. haha (Awesome book. Definitely worth the $4 IMO)
BroF, what do you generally shoot on your shooting day trips?
Have you considered a prime lens? If you're shooting indoors, then foot zooming should be good enough, right?
Yeah, primes were actually my first options...
Then I got a second lens and learned about the 'joy' of lens swapping out in the open.
I think I'm clumsy enough to drop one sooner or later and paranoid about dust clinging to the sensor.
I spent countless days debating on getting the nifty fifty or the 1.4, then the 1.4 vs 85mm 1.8, then if I should get any at all. Honestly, it's a hard decision because each prime has advantages and disadvantages... If there was 50mm 1.4 with the ring USM and build quality of the 85mm, I'd probably reconsider. (btw there's rumors that a 1.4 mkII will go into market in late March) I actually was REALLY close to getting the 85mm, but I realized on my 40D, the crop factor would make it 135mm.
I'm still thinking about getting a used nifty for it's f/1.8 and narrow DoF abilities. I'm going to see how well the tamron performs and make my decision then