have you actually logged oil temps that would call for a aftermarket oil cooler yet? do you plan on running lap after lap at the track?
for a street car it just seems like extra weight. plenty of people running sweets setups with no oil temp problems just using the stock heat exchanger on the oil filter housing.
id be more concerned with oil pressure and the oil pan design. might want to look into those 2 issues first if you have not already.