Everyone will have their own opinion, and many will advise you to buy used. Personally, if you're just getting back into this thing, you should have some support if you need it. IMO, rather than the Marantz, check out Audio Advisor - they're blowing out the Cambridge A640 Integrated with the matching CD player for $400 each. I think those are great pieces of gear. They also sell the PSBs you're looking at, so they can set you up with cables and all the other crap you'll need.
Don't get crazy with this - no matter what you buy, someone will tell you to buy something else. It's a whacky hobby that way. Still, I'll go out on a limb and venture a guess that nobody here will tell you you can beat the Cambridge separates at that price or near it. (watch this!) :)