Good choice Martin if its early 70's to mid ish 80's, later ones are chinese but will be far better than the normal rebranded cheapies you were initially after.
Toughy on powering it i initially had a Transwave Convertor 4kw (5.5HP) still have it as a backup unplug digi and plug in RT job done. Problem i couldnt hear myself think that loud and wouldnt pull the skin off rice pudding. Comparitively then went on to 5hp digi invertor much more usable but still useless had to go for the 7.5KW and just about manages startup with 10" chuck on to 1200rpm. Knowing the troubles had before i havent got the bottle to try any faster but ok with 5 1/4" chuck on. Starts with a right bang with gears meshing and about 1 sec to reach speed at 800rpm 10" chuck.
Do have a lesser 240v 1ph to 3ph 220V Mitsubishi i was going to put on over Christmas, may be some time before that gets tried. Also no point in VFD when you have the best gearboxes on any lathe and will be a pain figuring and wiring in the switchgear a must, dont use without.
Lastly cant believe the prices they are asking £2100 for cheap chinese at least 10-18 years old about that price new delivered. Similarly M300 gone through the roof as well, last 12 months £1800 – £2700 now £3 to £4.5k. Mine cost £750 8 yrs ago when generally going for £1600 – £2200, there at the right time.
Even on old worn out early L5 £1K no gearbox, i paid over the odds £900 for a 20 yr younger 140 with Norton gearbox, tooling etc who they kidding.