I had, and loved, the N2Xs...sold for reasons out of my control and while I totally understand where everyone is coming from about doing yourself a favor and just getting the better speaker now...
I say, get the N2Xs. They don't disappoint as main speakers unless you need high output, they're small enough to be used anywhere you like, and despite their low sensitivity, I had no trouble powering them with a 25 WPC Class A F5 clone. If space weren't an issue and you had an ideal room, the N3 would likely be the better option. It's really not going to be an issue where you sit down and feel like you're missing out... the N2Xs are fabulous.
If you need high output, want a more sensitive speaker, and feel like you're not too restricted on placement, then go for the N3s. If you're concerned about placement, size, cost, or any of those types of things....get the N2X. Either will satisfy you and you really can't go wrong.