I have the RV 360 I imported from the States ( saved me a fortune) only kidding.
The first one I had from Solutions UK was a 240 volt and lasted about a fortnight before it burnt out. Like a couple of others they sold they too went pete tong.
After a few e-mails to Dan at Roto Vac I decided to give the 110 volt a whirl with a transformer and hey ho spot on.
I have had the RX 20 in the past but found it to cumbersome for the domestic jobs unlike the 360 which is lighter to carry into houses. Having all the heads I can clean carpets, hard floors and carpet tiles with ease.
I would wait a little longer before you buy and see what the New 240 volt units are like, I believe they are due in soon.