Just answered that Q in the cooling system thread. Short answer... for me, no. For you, maybe
Just got my 120mm rad today. Much higher fin density, low profile, and a more powerful 120mm fan. Some reviews by overclockers said that after they upgraded their 20fpi rads to 33fpi they noticed a temperature drop of several degrees. Hopefully that'll equate to more effective cooling in this application. A fun project for the weekend!