Ski Santa Fe is underrated, and is very family oriented. They have a little bit of everything. A really good skier won't be bored there, but they have a ton of accessible terrain off the main lift. And the two upper chairs (especially millenium chair) have plenty of blue runs of varying difficulty.
In a marginal snow year, I'd pick Ski Santa Fe. They have a good snow making operation on their lower mountain and will likely have the best variety open if we get another skunky year. In a good year, I'd go with Sipapu or maybe Angel Fire. Or Santa Fe.
This...
Santa Fe has intermediate terrain off four lifts (But the blues are really blues, not beginner trails in disguise). Green terrain less so. But their grooming team is one of the best in the business. The same man has headed that group for decades and the snowcat operators have something like an average of 10 years at the Basin. So, if the snow is marginal, which it is looking like this year, that's an option. Also, Santa Fe is a much nicer town for a couple to spend time in than Angel Fire IMO. 11 hours from Austin
Ski Apache has wide-open great intermediate (in fact pretty much only intermediate) terrain. But the road up to it is a double black and if they are driving from TX on summer tires, it will be an exciting ride in the snow. 10 hours
No one has mentioned
Sipapu. They are already open on manmade snow. It is a small mountain with no town at the base, but some lodging and Taos town isn't far away. It sits in a beautiful location and it would be very inexpensive. Less than pretty much any place else. 12 hours
Red River is a cool little town and is further north, so, if the drought continues, it might have more snow than other NM ski areas. 12 hours
Not NM, but
Wolf Creek (Pagosa Springs) is another option and it pretty much always has good snow and has tons and tons of low intermediate terrain. 13 hours
Totally agree about Taos. Not worth the extra bucks for that kind of terrain.
Angel Fire does have good terrain parks, so if that appeals to the boarders, that could be a consideration. 12 hours
Since they're driving, the best advice IMO is to wait to decide based on conditions at the time.