Glad that you're doing good. Don't give up the trainer yet. Too often people try to move up too quickly and wind up in trouble. You would be surprised just how much the "trainer" can actually do. Burn about a gallon of fuel doing touch and gos. When you can fly around your flying field inverted with your trainer then it's time to move up. As an instructor I see students all the time want to move up too quickly, and then find that they get to their 2nd or 3rd plane and find out they don't have the skills needed to handle that much of a plane. I know that you're really excited and eager to move up, but trust me, you'll enjoy it all much more if you make sure your skills are up to moving up.

When you do move up, the 4*, tiger 2, Great Planes Rapture all make excellent 2nd planes. I would hold off of the warbirds until at least your 3rd plane.

Hope this helps.