I've been recommended Bob Jackson's a few times myself and I am going to send my frame there unless anyone says otherwise. There is a bloke on ebay that powder coats for £35 +postage of £12-15 but not sure how good he is, his feedback seams OK though.
I'm going black as the frame is now, with the Orange decals. At Bob Jacksons thats £65 + postage or collection £29 for collection £17 one way postage.