You need to think about what size. Most people coming from guitar seem to go for tenor or even baritone. Baritone is tuned like the top four strings of a guitar but it doesn't follow that that's what you will like

Check out the Southern Ukulele Store in Southbourne near Bournmouth.

http://www.southernukulelestore.co.uk/

They are uke specialists, have an excellent range and are good to deal with.