There's also a deal for N3DS + Choice of game at Walmart. When I bought my 3DS I ended up just waiting for a deal to pop up here at CAG or the 3DSDeals subreddit page. Good places to start looking for deals. If there's a deal going on, someone will post it. :3
you can most likely get it at gamestop tax-free if you pay with store credit (depends on store, i think)... some people hate gamestop, but it's still a valid option
If you want a deal on just the N3DS XL, then yes the Mover's coupon is your best bet. If you're okay with opening a Target Red Card, which hooks directly to you Bank Account or open it as a Credit Card, you can get a mover's coupon for Target as well as save 5% extra with the red card.