HI Crashmaster - there's so many planes you could buy.

If you want an out of the box "combat" model well the class you want to fly combat will dictate your model choice, unless you just mean tooling round with your mates. An EPP foam wing with a big donk and battery is hard to beat (say an Elebee from windrider on about 400watts). Like all elevon deltas you actually need people to fly with/against otherwise they get kind of boring for experienced pilots despite the speed. Not exactly expensive, but not exactly cheap either.

There are a lot of cheap foam warbirds out there at the moment (GWS knockoffs mainly) - you can put a little brushless in these (if they don't come with one already) and get quite a lively little flyer for only a few bucks.