When you are ready for an English wheel, there are three regulars here that make English wheels, and they are all reputable builders. In no particular order:
http://www.handbuilt.net.au/index.html (Peter Tommasini)
http://wheelingmachines.com/ (Kerry Pinkerton)
http://www.tinmantech.com/products/ (Kent White)
Each of these gentlemen are knowledgeable metal shapers as well, and you can trust what each of them tell you.
In addition, both Kent White and Peter Tommasini have very good instructional video series and Kerry has a Metalshaping 101 DVD.