Absolutely, without a doubt, a Steen Skybolt. Make sure you get one with a Canopy (or convertible which is a lot of fun). The 300+HP Models really kick you in the nuts. Also, if you like "building" or "altering" square the wing tips. Additionally, if you want the whole building experience, bird of choice is the Pitts Model 12. (www.2wings.com). Check it out. M-14P Radial, Bi Plane, Aero, Pretty decent legs, and the cockpit is way bigger than an S2S or Eagle.
Have fun!