Flashing my Radeon 8500's BIOS worked well for me too. I was a little reluctant at first but my aprehension quickly disappeared when I found out how simple and effective it was. I replaced the OEM BIOS with a Retail one, giving a 275/275MHz default clock and less agressive memory timings. This complemented the voltage mod I did at the time. Check it out here. Next move will be to write custom one and flash that for a 300/300MHz default clockspeed.
I would encourage more people to look into BIOS flashing as a means of setting a good overclock "in concrete".
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Bink's HWC GALLERY
Opteron firstname.lastname@example.orgGHz (stock HS/fan), Asus A8N-SLI SE (passive NB), 1.5GB RAM (2:3:2:5, 2T), WD Raptor 740GD 74GB, Maxtor DM10 300GB, Asus EN7600GT SILENT@???, M-Audio Revo 7.1, Nebula DigiTV, Dell 2005FPW, Enermax 431W Active.