I currently build litecoin mining rigs but would be happy to build you a bit coin rig if this is what you are looking for.
Lite coin mining is more profitable at the moment but there are still profits in bitcoins. The problem however is that when ASICs ship the profits for Bitcoin GPU Mining are likely to drop dramatically. And Asics are starting to ship now I believe..
You can check out my website @
http://www.miningrigs.co.uk or contact me at Sales (at) miningrigs.co.uk for any queries.