Honestly... I tried all the roms and noticed very little change and really never really cared for custom roms since non provided a significant raise in performance. Sure.. some sped up tf3d a bit but nothing to say :wow!". but in my quest to find out why my moguls opera 9.5 ran soo much smoother than my pros stock opera and upgraded opera, I found this rom by Juggs,
http://forum.ppcgeeks.com/showthread.php?t=43229
And WOW! This thing is blazing fast, now I am a believer! Opera runs like butter almost!