If you are in USA, I recommend getting it set for 120V ... (6550)
I agree with 6550 .. if you think to stay in US you should buy the 120AC Voltage version.
I don't agree with someone who says gears born for 240V. don't sound same at 120V.
It's exactly the same!
We can debate about the AC power cords .. these sure are different! But not the trasformers
IMHO