You don't need a class c comp to get the FSB up, just connect L1 bridges with pencil. It is safe and easy. Then change multiplier settings.
BTW some people may not know this but there are class c processors out there... I have one. I just bought a 1.2GHz Tbird and it had the L1 bridges closed, and when I started it on my KT7A-Raid it went to 9*133 multiplier settings by default.
Oh yeah and it was only $305 - 50 dollars more than the 1 GHz you listed, so I wouldn't get the 1GHz. Mine was OEM however and did not come with a HS/F, which I bought for an additional $18.