Very nice set up.
I do not know much about AE speakers but I have heard positive things about them (AE speakers).
My girlfriend currently uses a NAD 326BEE to drive a pair of Dynaudio DM 2/10 and they complement each other quite well. I too noticed that the bass definition with my GF's Dyns can be improved with a more powerful amp.
REL used to dominate the sub market but that was before they were bought out by Sumiko in the early years of this decade. I have 3 REL Q201E at my Mom's and my brother's place and I still love them.
Now that I have found out great alternatives like Hsu and Outlaw, I am willing to try their product the next time I shop for a sub.
IMO, Hsu and Outlaw make great subs for the $$$.