Help w/ VCore and o/c

I have a PIII 700 and Asus CUSL2-C. I can run stable at 980 with a 1.85vcore. Any speed above that requires 1.95 vcore. Obiously, the higher vcore makes the temps hotter and limits what i can do. I know the cpu will post at 1050. Is there any way I can get this to run at a lower vcore and are there any ways to make it more stable?
System:
OCZ Gladiator (36cfm) arctic sliver
Heatsink on clock generator
TennMAX lasagna on northbridge
Corsair PC150 RAM
Intake and exhaust case fans

sounds like your next step will be the liquid stuff.........