Value amplification for B&W nautilus 804's

I've been in recovery from an early adulthood case of audiophile fever for nearly 25 years. An opportunity to purchase a demo pair of B&W nautilus 804's at an absurdly low price seems to have thrown me into relapse.

I'm building a system around the N804's. Economy presently forces me to consider amplification (pre and power) options at no more than $1500, so an integrated seems to be a reasonable plan. I've looked at (used) plinius 8100's/8200's (MkI), Musical Fidelity a300 and a3.2, creek 5350se, classe cap-101, and even a krell kav-300il (pushes the price). A commercial seller discussed a new sunfire pre-power stack (250 wpc), and I've also toyed with other separates (used marsh 2000 + mccormack dna-1)?

Any advice for this pair of speakers?

Thanks