He does some pretty good reviews of ROMs, enough where you should get a pretty good idea what you want to flash.
A tip: I would do a Nandroid backup of what you have right now. That creates a snapshot of your current setup so that if something goes wrong (rare, but it can happen), or you just don't like what you installed, you can quickly go back to what you had.
Each flashing should be a reset/dalvik cache wipe. To be on the safe side, I would make a copy of the Nandroid on your PC.