Actually just noticed you are in Nottingham so if you wanted to nip down to Derby and pick them up that would be fine. I work close to Sainsburys on pride park just off the A52 coming into derby.
Presently have an R4 for my main rig and an R5 for the file server, I love their cases.
Modular PSU definitely helps with cabling but still awkward.
I had hoped some of the R4/R5 trays would fit in the 7XL but unfortunately not.
If I may ask, how come the abundant supply of sleds
I live off the Bardills roundabout (not literally), five minutes away so that could not be better.
That has probably made my decision easier, could probably sell the R5 for a couple of quid too.