Some clearing up..

If you get the k24a1 Accord/Element motor you want to get a k20a2 RSX head
If you get the K24a2 TSX motor you don't need to swap the head (alot of people don't know this)

Since your going to build it and boosted anyways i would just make sure to get a K24 Block with whatever setup you get. You will have 2.4 liter of displacement which will help you spool up that turbo faster and you will handout spanking's like hotcakes.