I don't think a P35 is a very good chipset to try overclocking on. I really think you could at least get 3.8 if you pushed it. Then again, you may just have a lemon proc.
P35 FTW! Easily holds it's own against the X38 and P45. My E3110 did 500x10 on mine, although it was only a CPU-Z screenie.
Lynnfield is what you want, they'll be on Newegg tomorrow (8th).
Dual channel memory controller with 16 integrated PCI-E lanes.
Core i5 750 2.66GHz @ $199 + P55 mobo @ $125.
The 7xx series has no HT, which shouldn't be a problem. It trades blows with the PII 955 but should beat it once both are overclocked. 8xx series has HT and will make the 920 obsolete.
I'm going for the 750.