This whole question of 'which gun am bestest?' must be the most asked, most pointless, and laziest question on every airsoft forum.
The correct answer is this: go and actually play a game of airsoft, rent a gun, see what you think of the game and the gun and ask some other people if you can take a look at their guns and see what you think of them. Then you will actually have a modicum of experience on which to base your decision and will be able to ask a reasonable question of other players.
Why the hell would you spend hundreds of pounds on something which you don't even know if you'll like? And are you really going to buy a certain type from a certain place just because someone on here likes it? That's ridiculous. Would you go on a driving forum and say: 'hey guys, I've never driven before but I've always liked cars. I have £20,000, which car should I buy and where should I buy it from? Oh, and I've also not even remotely bothered to look into others costs such as MOT, petrol, insurance, etc. Also, is there any way that I can drive a car without a license?'
And while I'm at it: UKARA isn't a license, but there are laws regarding the sale of airsoft guns - please stop asking if there are ways to circumvent them.