Mapman, my friend, there's no getting around it, at $8800 ($9200 with phono)for the Continuum 500, you're talking "real money", BUT I think it's an incredible value or bargain. I've never had a moment of buyer's remorse. As you note, the pre-amp section competes with separate pres that cost more the C-500 in total. It's really a no-compromise integrated.
NAD is a great "value" for those that can't afford or don't want to afford 9k (I fully understand this position and I've been there myself in the past), but no one's going to say that it'll compete with an ARC Ref.3 pre-amp, as is actually said of Rowland's pre. Forget about the power side, where Rowland is literally in a class almost by itself.
If you need more power than 1000 watts into 4 ohms, then you'll have to consider separates, like a Capri driving two Spectron III monoblocks. I have little doubt that would be wonderful, but expensive and much bulkier than the C-500. Hey, but if you need the power, you need the power. (I suspect - hope - that the 1000 watts will be enough).
Dave