The Phoenix Seabee is a ridiculously good airframe for $99.99 at Tower Hobbies:

http://www2.towerhobbies.com/cgi-bin...?&I=LXGTS5&P=7

Other notables that are similar but slightly more pricey are the Great Planes Venus 40:

http://www2.towerhobbies.com/cgi-bin...&I=LXBMZ5&P=ML

...and the Model Tech Excelleron 50 available from Hobby People, which is on sale for $129.99 right now:

http://www.hobbypeople.net/gallery/127564.asp

Pattern planes are a great choice for a "third aircraft" and the perfect stepping stone before jumping into scale aerobatic planes or warbirds. Hope some of these suggestions are of interest to you. Happy shopping.