BQ,

Ideally, it would be best if you could audition them all and keep the one you like best; I wouldn't rush to part with the 990, I'd wait until you had a listen to the other two. The 990 is incredibly versatile and great bang for the buck. It's all a matter of compromise, it seems. And, these systems are all in a state of flux, I think and so if you could be patient, you might find a greater number of choices in the future (at least that's what I'm hoping for and, so for me, the 990's a practical holdover).

My Anthem amp is notably bright and so this also contributes to the analytical side of my listening experience. The B4 is certainly not that way, is very warm and powerful (ideal for the DQ10's), but obviously not an option for surround sound. I'd like an Anthem D2, pre/pro, but I understand the setup is more complex (required to get the best from it) and also very pricey, by comparison.

Again, I hope this helps.

Good luck and keep us posted.

John