Pass Labs VS Classe

Tboooe, 802D and N802 are pretty different sounding speakers. N802 is brighter and probably quicker sounding than the 802D. The diamond tweeter on the 802D is not as forward sounding as the N802's tweeter. there are more sonic differences as well.

That being said, I'd try both amps if possible. I don't think I would recommend one over another without knowing the preamp and room acoustics.

Unfortunately I don't have a pass dealer in my area. I've heard a 350 and fell in love with it but have never had the chance to audition the .5 series.

I'm very happy with Pass X250.5 and N803. It is a very good combinaition. I haven't heard the older series vs the .5 amps, but from what I gather the .5 is a better amp.
I don't think you can go wrong with the X350.5 or the Classe, but I would like to know which preamp you plan on using. As many times as I've heard Classe/B&W N802 combination I was always impressed. But it was always within an all Classe system. So what's the preamp?

I haven't fully decided yet. It will either be a theta CB3,meridian 861 or the classe ssp 800. I am leaning towards the meridian