I think what Layston is asking is if anyone has any particulars they know about each lens, to let him know, so he can look for it. Like, quirks and such. For example, Purple fringing on 85 1.8, etc. etc. I think it safe to assume he'll do all the other normal tests on the lenses.
I have the 35mm F2, and I like it. Yeah after using USM on my 10-22mm, 24-105 and 85mm, the buzzy sound of the AF was quite humorous (it does sound like a bee in a matchbox). But it was sharp, AF was quick,and generally I've had no problems with it. In good light the colors jump out at me, which I always like.
Plus it's light. I got a FF camera for christmas even though I'm a beginner and hadn't even scratched the surface of my rebel. But now, a FF cam with 24-105 on it, is not my idea of incognito. The 35mm makes my kit nice and I like it.
As for filters, you have 77mm already right? Step up rings as tkbslc mentioned. They're like $10.