[soah]

Would you checkraise the flop if you held two rags as well? It's pretty unlikely that this hand will make it to showdown when you take this line -- you will win if your opponents fold, and if they do not, then you will probably have to give up against further aggression. The fact that you have top pair is mostly irrelevent (other than that it's one less ace for your opponents to hold).

And if MP1 calls your checkraise, I think you are going to have to fire again on the turn, because it's pretty likely that he is drawing at something. On the other hand, if UTG calls your checkraise then it's probably time to give up (unless you think you still have a good chance of bluffing him off a slightly better hand, but that's a bit beyond the scope of this thread).