step up transformers


I am buying a Sphinx Project 16 amp from Austria and want to use it the USA. Prior to rewiring the amp I wanted to get a step-up transformer to use the amp. It is a high current design so the transformer needs to handle plenty of current. Does anyone have any recommendations on the tranformers that won't adversely impact the sound.
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Hi try this place they are highly rcommend just ordered my self for the same reason.
http://www.candhsales.biz/cgi-bin/shop991/shop.pl/SID=200731383/page=ULIS.htm#ST
Hope this helps.
K-Rose, Which of the transformers did you order?
YEH THEY HAVENT GOT THE ONE i WONT IN STOCK IT WAS A 5 KVA EXTREME ISOLATION TRANSFORMER Xentec #EIT5.0-2 The inter-winding capacitance is 0.001pf. Input 100, 120, 200, 220, 240, VAC 50/60 Hz. Output 120/240 VAC. Stock #STR2150 $395.00 I FOUND A PLACE CALLED SAM STORES THEY HAVE RANGE ALSO NOT SURE ON THE QUALITY JUST KEPT GOOGLING IF YOU FIND SOMTHING BETTER LET ME KNOW.