Chris hit it right on! The Avalon has such tremendous range that a few gauges higher or lower shouldn't affect the overall sound.
I experimented over a period of eight months with different sets, letting them settle, going from 12s all the way downn to 8s, one gauge at a time. Heavier strings do have relatively better tone and stability, but it's a matter of degrees. Light sets (8s) were tonally inferior to heavier sets (muddy chords, glassy, watered down tone) but believe it or not, still useable depending on the sound you want.
It has much to do with your playing style and intended ambience, i.e., big room or small room, amplified or miked or not. Open chords, fingerstyle, detuned: go heavy. Leads, bluesy bending or barred chords up top: go light. Or break all the rules! The Avalon has the headroom you need.
Changing sets may bring up some relief issues. If you're dealling with Avalon directly, advise them of your gauge preference so they may adjust the truss rod based on your set, or have a pro do a set-up, or do it yourself! All you need is a ball-end hex wrench, a feeler gauge and a little restraint!
For my D200ce, I settled on a set consisting of D'Adarrio 80/20 wound bottoms (47, 35, 26) and plain brass-plated steels on the top end (18, 14, 10). Note the unwound G; maybe a slight loss of depth, but I'm a bender so it works better for my style of play. (BTW, I make up my own sets to better balance the overall tension. Individual strings of all sorts are available at JustStrings.com.)
The D200 has the same lumber as the L32 and it sounds MAGNIFICENT!