Hi Alex,
I've decided on the SkyWatcher Black Diamond 80mm doublet on a HEQ5 with GOTO. After all of my recent reading, it seems like a good balance between not too steep a learning curve in astrophotograpy and something that is still going to be enjoyable for viewing.
I havent comitted to the prchase just yet, so would love to hear anyone's input (although this setup is pretty much at the upper end of the budget!)