I guess some of it will come down to if you meed the extra centre height on the M300 and/or a gap bed.
I considered an M250, but decided that for the same footprint I could get something a bit bigger and versatile with the higher centre height and a gap bed.
As it happens I'm off to look at something entirely different tomorrow, so I'll let you know if I have a rush of blood to the head and commit to it.
Bill
p.s. I was going by this comment;
In the last years of production only Bantams with an increased centre height (6.5 inches) and a top speed of 2000 rpm were offered – but these machines should not be confused with the completely different Mk. 3 Bantam, which Colchester called the "Bantam 2000" – and which was actually a Harrison M250
Edited By peak4 on 14/11/2017 00:28:19
Edited By peak4 on 14/11/2017 00:28:56