I agree with Wade. Get a ATC one. I also got mine on EBAY. BTW I think they only measure BRIX and not 2 scales. All you need to do is convert brix to SG.
I have one for when I make BEER. I can add a HOT sample and get a good reading.
Now for WINE, Are you gonna make from grapes? If so the get one if you plan on picking. If making kits I see no advantage. Make sure you have at least TWO hydrometers. That will be your best friend in winemaking.