Another site merger question for you guys and gals. I'm combining one large site (1000+ pages) with a medium site (~350 pages) under a new name (for various reasons). On the large site there are lots of pages which don't really fit with the new site so want them gone (ie: they're not going to be moved to the new site - adds up to a couple of hundred maybe).
So, my question is - given the above is it better to a) 404 the pages on the old site first, wait until they're removed and then 301 the site to the new domain or b) 301 the site and then 404 the redirected pages on the new site. Or c) does it not matter?