I think there are pro's and con's to every rom out there depending on your own personal taste. First make a nandroid of what you have now. Then figure out blur vs blurless and try a few. I usually give a new rom a few days to "settle in" and play with the settings to make sure I'm giving it a fair shake. All the heavy hitter roms with the exception of Tranquility are posted in this forum so my suggestion would be try them all.
I organized several folders on my sd card to allow easy rom changing to include a recovery folder containing maderstock, z4root, bootstrap, several full custom rom zips, and of course my nandroids if i'm in a hurry. Then its a simple matter of restoring a few things with titanium and appbrain. I can pretty much install a rom cleanly from unrooted 340 and restore my apps and settings within 10 minutes now.
I have tried Darkslide, GummyJar, Apex, Fission, Liberty, Tranquility, Unleashed, Rumm Rx, and countless theme variations of each. I prefer the blurless roms and found GummyJar and RubiX (my default OS) to be the best for me in terms of speed and stability with no issues at all.