Dura Ace Hubs, Mavic Open Pros and wheelsmith spokes are what I use and should be within budget. The Pros are really hard to fault. They take a helluva beating on my cross bike which gets ridden off road a lot and the rear one only died when some tube in a car deliberatley rammed into the back of me on my commute home a couple of weeks ago. Ultegra hubs are also very good but the sealing on them isn't as good as Dura Ace and I've found they wear out a fair bit quicker than the Dura Ace ones.
The Pro's are double eyeletted for extra strength.
Big Al at Wheelcraft will build you a set mail order and at the best price. 01360 312 709.
If you buy Mavic pre builts, be prepared for the rear hub working loose and wearing out and having to buy a full set of spokes if you break one. Kysiriums look ace but they are very stiff and not hugely lighter than a handbuilt Dura Ace set. You may be crying if you have to replace a Kysirium rim. Last time I looked, they were over £100!
Cheers
Sanny