Which do you guys recommend for dc, like which is best in your opinion ?

Also, I bought a sms II a month ago from the UK, I have a USA tv and outlets, I'm kind of hesitant to set it all up, will it work 100% ? I think UK is 50 hz and USA tv are 60 hz but I heard that model sms II (small gray/grey) can play fine anywhere in world (besides Japan) and even those models can play uk carts in usa or usa carts in uk, is all this true ? I hope the play at full speed or my sms II doesn't blow a fuse or has slowdown or anything. Any of you have info which can help me ?