I got mine imported from US to Europe and therefore I use a 220V/110V stepdown converter and a PAL TV.
And guess what, Wii still works just fine
As for the Wiimotes:
I'm using Duracell Ultra M3 batteries and with 4 hours or so gaming each day, they last more than a week.
And my Wiimotes have taken their fair share of beating and hitting around. The result: Nothing. Granted I was careful not to force the wrist straps too much, but the remotes themselves are quite sturdy and I'm fascinated by people who can break them while gaming. I'm a pretty big guy myself (6' 7") so I figure it must take a pro-wrestler to take down a Wiimote :P
So, for all those who still have doubts about getting a Wii because of its rumored problems.. The answer is definitely yes, go get one