BTW a couple of people on the Pagestream mailing list mentioned that printing to Xerox colour lasers using TP to make the PostScript gave the same results as on PC. We're talking 2400 dpi though ;-)
Personally I'm going to be looking for a good solid 1200 dpi laser with 32+ Mb, I use a HP4000 at work and my publisher can equal it's B&W photo reproduction.
With HP all-in-one printers I've seen 4 at work, out of which 2 had a broken scanner after 2 years of light work - if you're getting one be sure to buy a 3 year support pack!
