I'd say move up to a good 450 or if your budget permits a 550 or 600. In the 450 class the Trex is certainly the most popular and easyest to find parts for I have a Black Hawk 450 SE I got from KA Planes Its a little harder to get parts ( three day wait for mail order if I dont have the part already) for but is just as good as the Trex IMHO and not as expensive. I also just ordered a Hurricane 550. A bit more expensive than the 450 size but the reviews I've read are positive for thre most part (the 1st run hade some minor issues that have been addressed by the Mfger).
Or The Trex 600 expensive.