What amp is best?

If you want to start with 2ch serious listening than you ought to get an integrated Unison Unico(free trial or for a misurable price for a week or so) or Plinius 8200.

I have thought about an x250 for the 802's and an x5 for the rest or an hpa3 for the fronts or an hpa2 and an amp5 for the rest.

I listened to a Pass X150 in the same room as a Proceed HPA-2 both playing N801s and I have to say that I loved the X150. It is expensive for 150W but man was it nice. The proceed was nice too but not quite the Pass. May not be the most cost-effective for 7 channel however.... Proceed is way more accomodating with HT. At least you have dealers in your area! I only get to visit them on business trips. Go and audition them and see what you think. Arthur

Keep Canada green, buy Bryston. No. I am not related in any way to that concern, save and except as a satisfied customer. Good day!

Since you have the B&W setup, I'd recommend you to look at a Sunfire Cinema Grand - the Nautiluses do like to be "fed" properly, and the Sunfire is up to the task, while also giving you the best of both worlds (or at least a decent compromise) for HT and music. You can keep your current amp for the rears and the budget relatively low.