FWIW, here's some info I have learned first hand regarding wii controllers.
For the wii remote, I ended up buying 3X FlingSmash bundle from TrU with Groupon, about $15 each.
For the Nunchuk, I used my $10 off coupons from RadioShack and got 3X Kama wireless Nunchuk free (clearance at $9.57 each), I couldn't find the item on radioshack.com anymore, but some stores still have it, some of them had it in the back. I've seen two different packaging, one with only a plastic shell and one with an outer box, both worked fine, and near identical.
Here's a
amazon link.
I've played the wii sport boxing game both with the official wired Nunchuk and the wireless Nunchuk. There might be occasional delays, but honestly I cannot really tell because the official wired Nunchuk also had misinput (or very possibly I simply suck at the game). However, IMHO, the wireless kama being wireless offers much more freedom, had I not got a wired official Nunchuk with my wii, I'd have oped for another wireless one.
I've also tested the wii sports archery game with the kama wireless, worked perfectly.
I've read some review on amazon that they could not get more than one kama wireless to sync, that is simply not true. I have personally tested playing 2-player boxing game with two wireless Nunchuks synced to two remotes, had no problems at all.
One minor complain is that the plug that goes into the wii remote is a little wider on one side than the official one and you need to move the silicon cover to fully plug the thing into the remote. It's a little annoying but not a big deal, I'm considering to trim the silicon cover a little (no more than 1-2 mm) to compensate.
Lastly, I am a CAG, and instead of forking out $20 for the classic pro controller, I went with the $5
PS2 to Wii Controller Adapter.
I ordered two, typical DX order means I most likely wont receive it until next year... I'll post a review when I get them.