Wierd. Most of the 'comfort' or 'user friendly' complaints I've heard were about the SL8 rather than the USC. Then again, most of what I've heard on the SL8/USC is the tired old 'well, if it doesn't have hi-cap mags, it fuken sucks'. Yawn.
Total average from what I've researched and read is that you should expect 2-3 inch groups at 100 yards with the USC. Not perfection, but I think pretty accurate for what it is. Guess you need to pin down what you are using it for. If you're looking for a plinker, try to find a slightly used USC...should be able to find one for about 900 or so. If you are looking for something more serious, I'd think of looking elsewhere.
The SW's will definitely, I think, not fit your needs. Not bashing them, but every experience I've come across says that SW's are good for plinkers and nothing more.