as far as I know the 1.6+ ROM's all have a few bugs yet, and aren't exactly ideal for using as an everyday ROM. From what I can tell, the two best ROMs (opinion of course) are Modaco's newest one (2.2 I believe), and Fresh 1.1. Modaco's is going to be updated a bit tomorrow, to remove WaveSecure and make it an optional pack. It's also based on the new kernel, and certainly seems fast, but I haven't noticed any major differences in speed between that and Fresh 1.1.