I actually ended up preordering a Pro SX.
I do still think that Atmosphere is da wae in the long run, but the USB dongle is just too useful the pass up. TX confirming that it would support loading other payloads sealed the deal.
The lack of emuNAND requirement is also a huge plus.
lol same here. i preordered one because the dongle is more convenient than tethering. i really dont plan to use it until i see what Atmosphere is about and their solutions to emunand and hopefully customizations.