first of all what cpu do you have?
is it overclocked or you planning to overclock it?
1.for dual core something like a h50 will be good.
2.for overclock dual core or quad core the h50 is still good i guess, but i would go for a 240 rad instead, and use a ek supreme or delta v3 wb.
3.for a i7 i go for tripple or if you really extreme a quad 120 or even 140 rad. and a heat killer wb.
pumps, i go for ddc pro or ultra for 2/3, so you can add wbs later on if you like...