Re: confused about the right heads
SK2 is a great kick head for the sound you describe. I have one on my kick (also 22x18).
I couldn't be sure what my front head is as it's a Gretsch branded one but it reminds me of a Remo PS3 - It has a ring of extra ply around the edge. You might even want to just change the batter on the kick first for the SK2, and see if you like the sound like that - you might not need to change the front at all.