Several points:
Don't get caught out by State Sales Tax in the US. Prices are quoted before tax, unlike with VAT here.Different States have different rates. If you are going to several states it may be worth buying it in the state with the lowest tax rate.
It will come set up for 110v US power, which means you will need an adaptor back here.
The exchange rate will be the key.
Throw away the box and make sure you have used the thing, got fingerprints over it, know how to use it if asked etc. for when you bring it back. Unlikely you would get stopped, but you wouldn't want a nasty Duty/VAT bill when you arrived back home.