Happy Cog (www.happycog.com) for UI, Thought Works (www.thoughtworks.com) for back-end (Please note, I'm not employed or affiliated with either company in any

Happy Cog (www.happycog.com) for UI, Thought Works (www.thoughtworks.com) for back-end (Please note, I'm not employed or affiliated with either company in any way) I'd imagine both are very expensive though, so I guess as always it's a case of "it depends on your budget" :)