If you decide on the basic DW-5600E I’d wait a short while because it’s getting the ‘U’ treatment. So it’ll have the better, more efficient LED backlight (5 year plus battery life now, rather than 2) but more importantly the UK date format. It’ll be the DW-5600UE, some have been spotted in the wild already.
Personally I’d recommend the GW-M5610U. Easily worth the full price for a new one.