The $54 price difference I'd be looking at between these two is not an issue. I am planning on music mainly or completely for whichever one I build (depending on which system I put them in). Though I forgot for a while after seeing Danny's post about the X-LS Encore that part of the reason for building the A/V-1 (or N1X) was to gain experience building crossovers before tackling an N3 and N3S build. Do the upgrades for the X-LS Encore come pre-built or do you get the upgrade parts and have to rework the crossover boards to install the upgrades?
I'm building a set of N1X and A/V-1 cabs right now. The idea was to use the A/V-1 cab build to make my newbie mistakes on a smaller cabinet then fully build up the N1X. I have made plenty of mistakes on the A/V-1 cabs so this part of the plan is working

As a matter of fact, it has worked so well that I have to recut most of the A/V-1 panels since I glued them up out of square.
I could easily cut them for the X-LS Encore instead. Then I could build up the N1X pair for the crossover experience ... however the cost of an upgraded N1X is about 2/3 of what the upgraded N3 would cost ... decisions, decisions.
If I knew I could afford to build up all three sets I would do the X-LS Encore, N1X and N3. Then again, what would I do with the extra set of speakers when I was done?

Maybe I should stick with the original plan of building up a set of N1X's then N3's. It's just that the X-LS Encore is so tempting .... Am I officially sick yet?