I started with SS. Tried many since. My highest quadrant was on PE 1581 w/ 1.1ghz slayher. I'm stuck on CM now. Probably stick with CM.
The new Miui just released(22.214.171.124 build) is pretty awesome. Much better than the last build. Also, I tried Sapphire 2.0 and it was really great with amazing battery life. But Miui is definitely the most original Rom out there and is really unique compared to all the other Roms I've tried.