Hrmm... for AMD, I'd say make a 4bolts option AND include the LAME ZIFF retention clips (even though they SUCK are are prone to breaking, cheap POS plastic!) But I'd go SOLID COPPER! Forget all the frill-plastic crap, as you can see from some posters, they CRACK, bubble and sometimes burn, where as with tried and true copper, none of the above, plus it cools better. A nice spiral or maze is the standard design... or you could try the modified heatsink approach...
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XP 1600+ AGOIA-Y (GreenLabel, UNLOCKED!@/ NF7-S 2.0/ PC 2700 DDR
10.5*172FSB(1806/ 1991 high), Vcore 1.792...@84.95Watts
--86' Chevette Heater Core
--1/2" Vinyl tubes
--Via1300-Stealth Mod(QUIET!) 
---Home made copper-tube block
---PVC small internal res
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