The motor in the tsx(k24a2) has basically the same head as the type s. So there would be no need to swap the type s head on there. The k24a3 is the motor that you would need to swap heads on. You can find these in the crv and accords. The k24 in the crv would be the one to get, because it does not have the egr crap that the accord has.The k24a3 can be had for cheep, real cheap. Then just find you a type s head and there you go. It all depends what you are going to be doing to the motor later on down the road. Here are some specs on the k motors
http://www.ephatch.com/forum/showthread.php?t=52869