My intended use for the system has changed slightly so the amount I'm spending at launch has gone up. My wife is good friends with one of our neighbors and she has two 9 year old boys. They're possibly the nicest kids I've ever met and she works evenings so I'm getting an extra pair of Joy-Cons and a bunch of multiplayer games I may not have considered before so we can all play.
At launch I'm getting the Switch, a 128 GB Micro SD card, a Pro Controller, an extra pair of Joy-Cons, Breath of the Wild, Super Bomberman R, Snipperclips, and the BotW archer and guardian amiibo's. That's about $650 before tax, but I had a bunch of trade credit and Amazon gift card money so it's more like $400.