Agree with Bimasta. I also own a 100VAC Denon DP80 and use a stepdown. If anything, the step down transformer affords a form of isolation from your household AC contamination. You can buy a very capable unit for well under $100 off eBay. I actually own two of them.
Pani, Based on having owned an SP10 Mk2 and what I know about the GT2000, I would choose the latter. This is not a night and day difference, and it is not meant to slur the Mk2, which is a fine turntable. However, I like the "bi-directional" servo mechanism (I think it may be similar to the circuit used in the Victor TT101), the over-size platter, and the coreless motor of the GT2000 vs the Mk2. This is just my opinion.