I have a GO panomatic lunar XL (the ruthenium dialled version) and it's a beauty. I did have the benefit of trying one on before I bought though (albeit in Las Vegas). I didn't buy that one at the time, but fell in love with it and had to have one. Easy, thinks I, bound to pick one up second hand.
No chance. Took me over 12 months to find one for sale in Europe, when one did come up it was in France. However, undeterred I was on the plane at the first opportunity..
http://forum.tz-uk.com/showthread.php?263142
Go for it!
Cheers,
Plug