I'll answer some of your questions. First of all, concerning the basic/deluxe choice, if you go basic the two main things you're missing out are Nintendo Land and the digital promotion. Nintendo Land can be found easily for about 40 bucks so that's not much of an issue. The digital promotion though is very interesting if you are planning on downloading a lot of games and is only available with the deluxe version. For each game you buy, you get roughly 10% of the price in points so a $60 purchase gives you 600 points and every 500 points you get $5 credit in the eShop if I'm not mistaken. Don't quote me on the exact details (I have a basic model) but that's the overall idea.
The rest of the stuff on the deluxe pack isn't very interesting. 8gb vs 32gb doesn't make much of a difference, especially with an external HD. You might want to look into the Zombi U pack too which seems to have a pretty nice value. Else, depending on where you live there's a few discounts at specific places on the deluxe pack.
Wii Pro Controller isn't compatible with all of the games (NSMB:U comes to mind) but it is with most. Gamepad works great though for all games and unless you really want a very comfortable controller, I don't see a reason for getting the pro controller. (this will probably change once smash gets released).
You'll need a wii remote (or an additional classic/pro controller) for the multiplayer Wii U games. On the other hand, any wii game will require a wii remote (and often a nunchuk) if you want to play it on your Wii U. To play wii games, the console basically shuts down and reboots in wii mode, so anything wii u related is inaccessible.
Hope this helps.
edit: Oh and absolutely get SMG. I played that game for the first time ever on my Wii U a few weeks ago and it was simply amazing!