what 2.4ghz system?

[captainlip]

Ive got the standard b4.1 and its had every single piece on it upgraded now apart from the radio system

Its a standard xp setup but now as i have some advanced kit in there i want to look at upgrading

I want a short aerial and some advanced features but on a lower budget, ie not over £150 for a system

What ideas do you guys have? Never had an issue with the xp system