I've heard modded MMGs (crossovers and magnestand frames, not like the more vastly reengineered "Gunned" models), spent a good half hour alone with a pair of .7 at a show after hours, and heard X-Statiks at a get-together (stock crossovers).
In my experience, maggies can sound good playing rock music, but it took a hefty amount of current drive from amps to get there for me, I needed to sit near-ish field to get in the ballpark of the impact a dynamic driver speaker could do, and in any case the small maggies really did need a pair of subs to pull it off (1.6 in the right room might get away without, and 3.7 and up no problem). The X-Statiks easily played satisfying rock music out of the box, but again felt a little lean in my opinion without (at the time) a pair of 15" paper driver ported subs doing the heavy lifting. To split hairs even further, looking in to genres of rock music, classic guitar-driven rock I'd give the nod to X-Statik all day, but electronic and some industrial/techno/synth music I'd maybe give the maggies the edge (with a pair of cone driver subs) as these kinds of rock music play more squarely in to what maggies are known to do best.
I don't like the idea of using the term, "lateral move," but in my opinion within this focused scenario it is more apples to oranges with the understanding that you like both apples and oranges. At the price (read: very reasonable) and considering you're looking for a speaker that is specifically good at what the maggie isn't as good at, the X-Statik wouldn't be a bad way to spend a few weekends DIY-ing a project to find out. If you've got a little more money to spend, the NX-Otica with the OB neo3 - planar magnetic - tweeter (making it open baffle throughout the range instead of the sealed-back dome tweeter in the X-Statik) might just end up your end game speaker that doesn't give anything up to the maggies' strengths while also shoring up their weaknesses.
[Edit because I saw your post as I was typing] If the NX-Otica is your possible end-game in this experiment, maybe build out one of the NX-Otica MTM kits (if you've got some subs that can play high enough to fill in, in the meantime, or just to check them out as proof of concept) might be a lower-cost point of entry to try the design out? If you like them, going up to the full NX-Otica would reuse the drivers you bought building the MTM and just adding the additional lower drivers, bigger cabinet, and rebuilding the crossover.