Some US sets accept PAL (576i/50fps) input signals, but most do not. You will have to look at the specs on the set in question to certain.
PAL to NTSC converters are available in the $100 to $400 price range, depending on the features. So you could look into one of these.
Some online retailers, e.g., Sams stores, 220depot re-import Asian or European models of popular sets, that do include both PAL and NTSC support.