Well, it's been a while but I thought I should finish off this thread. The 30A ended up beating the X250.5. It was more natural sounding, with a little less harshness to the sound, although with poorer bass control (as everyone would expect). Voices sounded much more natural through the 30A and the soundstage and imaging were also better. It actually didn't take too long to make that decision.
I also replaced my REL Storm with a Thiel SS1 (and passive crossover). The SS1 definitely integrates better and is less boomy, although there are times where I feel that the REL made a slightly better band-aid for the bass issues I've experienced. Because it wasn't perfectly crossed-over, it overlapped a bit with the Thiel 2.4s and hid some of the bass a bit more than the SS1 does.
I also replaced my REL Storm with a Thiel SS1 (and passive crossover). The SS1 definitely integrates better and is less boomy, although there are times where I feel that the REL made a slightly better band-aid for the bass issues I've experienced. Because it wasn't perfectly crossed-over, it overlapped a bit with the Thiel 2.4s and hid some of the bass a bit more than the SS1 does.