Thanks all for your comments to date
Finally found a retailer with stock (Andrews Comms) and bit the bullet. On order is an SW ED80-BD and an EQ5Goto mount.
Thought long and hard about an Orion ED80T CF, and a HEQ5 mount, but in the end it came down to budget and needs. I'm confident this will be the right mix for my first scope (ooh did I say first
).