Though I hardly shoot film these days, I'd get one of these.
I've always preferred the manual, folding GS645 (which I have) to the giant-P-&-S GA645i (which I also have). But unfortunately the 645 format itself doesn't offer me much these days.
But 6x7 is still interesting... I have a Mamiya 7, but find it too bulky to travel with these days since I'm packing a small child along as well now. And before you say Plaubel Makina... I had one of those too, but it was too tempermental, particularly with the weakness of the scissor-links, and it was also surprisingly heavy.
Anyway, so a compact folding 6x7 with modern optics and an AE mode... very tempting indeed. And for practical, not "nostalgic", reasons...
j