It really depends on your taste but the best website to look is
www.airsoftmegastore.com they have the best prices and have free shipping on items over 100 bucks.if its an AEG look for full metal gearbox and with a FPS of around 380-400.it will probably end up being 150 to 200 bucks.if getting a sniper rifle look for at least a full metal recever and barrell and 450 FPS(feet per second).