Offhand, does anyone know what the typical and maximum overclocks I can expect with my XBX2 and an E6600 (all stock voltages, air cooling)?

Details: this is the first board I've really done much overclocking with. (Of course the XBX2 Memory Calculator has been immensely helpful.)

Anyway, I've got this board, 1x2 GB G.Skill DDR2-800 "HZ" memory and an E6600. Cooler is the Thermalright Ultra-120.

What's a "typical" overclock for this setup? I.e., an overclock that should be stable and attainable by 99% of people with the same hardware? Note: I'd like to keep all voltages stock.

Right now I'm running FSB=333, strap=1066 (ratio=2/3). The system seems stable (I'm running Linux, but ran Orthos under Windows XP in a virtual machine for eight hours; also running seti@home on the Linux side). G.Skill says this memory is rated for 2.0 to 2.1 Volts; I've got it set to 2.04 as of now. I just upgraded the BIOS to 2770 (from 2333; also disabled the watchdog). Memory timings are 5-5-5-15.

This seems to be a pretty popular mix of hardware; I'd like the system to be as fast as possible, but with a priority on stability. I.e., I'd like plenty of safety "headroom".

Thanks!