I'm pretty sure you can get a SuperOrb for around that price, and it should sufice fairly well..
although, you can't go wrong with the Alpha PAL6035, cooling my 700 @ 1Ghz 🙂
They will cost you more aroudn 30, but it's worth it.. If I could get 300 extra mhz on every processor I've baught for 30 bucks.. I'd be happy.