As I think Frenchblade has said, very few shops sell DE razors these days but there's a thriving online market. If you don't mind buying online (and delivery is usually within about 2 days) then there's the likes of Connaught Shaving, Traditional Shaving Co, The Shaving Shack, and Badger and Hone.
I started with a Merkur 34C HD and use that as my main daily shave. Blades are a very personal thing, I like Gillette 7 o'clock yellow, but everyone's different. Someone can probably send you a few samples to see what you get on with, if you don't get any offers then I think I have a few different ones knocking around.