NAD certainly makes good gear, but I haven't heard any of their recent stuff. (Interesting NAD/Outlaw trivia: Outlaw's president, Peter Tribeman, was head of NAD's US division from some time in the '80s until the early to mid '90s - a connection that has often been cited as part of the reason for Outlaw's minimalist design style and the green power button that appeared on Outlaw gear up through the Model 950.) I don't know that the NAD would be classified as more musical than the Outlaw - certainly not as a general statement (the 990 is excellent with music, for example). There may be some folks around here who have heard both the T773 and the 1070 who could offer some first-hand feedback.

The idea of separate amplification for now could be a quite good upgrade - the RTi12's aren't as difficult to drive as the LSi's, but they will probably appreciate the extra power offered by a separate amp like the 7200.