If you haven't looked at it yet, Poweramp is well worth the money. It came out long before WinAmp did and was one of the first media players on Android that allowed for gapless playback. Since then, it has done nothing but be improved. Lately, there hasn't been any updates, but this app works really well. The only thing it can't do is sync between your PC and the phone (like WinAmp could over wireless), but that didn't seem to be a functionality I used much. I always went back to Poweramp. You can also swipe across the screen to change tracks and/or albums.
So, you might want to look at that.