I am looking for a good heatsink for my i7-920, and I came across this one,
THermalright TRUE black
Is that a good choice? (I am looking to keep the price under like $70-$80)
The TRUE Black is out of stock. The original TRUE is identical except it lacks the extra set of fan clips (to run two fans). I wouldn't recommend running two fans anyway. Go with a single, high performance (High static pressure) fan rather than two low powered ones such as the Antecs you picked out. The TRUE has very densely packed fins and performs much better with a powerful fan.
This includes the LGA-1366
blot-through kit. You could use the included fan as a case fan, but it's not worthy of a place on the TRUE.