Pass X-250.5 or McIntosh MC402?

I don't think X250.5 will be optimal for your N802s.
I drive N803 with an X250.5 and it is just wright.
You'll need at least an X350.5 or if you go with McIntosh, then go for the MC501 monoblocks. Don't bother with the MC402 because it won't provide the proper drive for the N802s and they may end up sounding lean in the bass and with tilted up highs actually with both the X250.5 and the MC402. You need more power for these speakers.
Pass X350.5, MAC MC501, McCormack DNA-500, or may be one of the bigger Classe amps.

Brianmgrarcom, I think the N802 may even be tougher to drive than the newer 802D or so I've been told by the B&W dealer. Supposedly because of the improvements in a crossover design in the newer D line...but don't take my word for it...

I'm going for my personal record within the past 5 years....no changes for a year....will be in Feb 2008.
Well, except an addition of a turntable...but I don't consider it a change...it's an addition
:)

I've been buying tons of new music and attending live events instead of blowing $ on components lately.

At times, in the process, we get so sucked in in changing components that we forget the purpose, which is to enjoy the music. We don't even let the components and cable break in and settle before we already start browsing the classifieds here.

Be strong Mitch. :)
If you like the way the rig sounds, leave it alone. The grass MAY be greener on the other side, but to find out if it is, sometimes it gets costly and doesn't necessarily have the desired outcome. Synergy is the key, but the downside is that it is easier disturbed than achieved.