I dont think they make the Monitor 3s now, I think they've been replaced with the Titans, which look a lot snazzier than my 3s, haven't heard them though. I think they 3s were around $500 or $600, I don't recall now. The Atoms are like $329 or $350 now I think, so the Titans would probably be close to twice that I would think.
Makes the 902i's seem like a real value now at $225.
I know others here have said to go used but you can really put together a decent sounding system on the cheap.
I have a pair of CSW Tower II speakers, a Marantz SR7400 receiver, Niles SI 275 amplifier, and several other pieces that go into and out of my system on a whim.
Those core components cost me a grand total of $267. The Marantz was an ebay thing, $67 shipped, the CSW Tower II was also ebay but the seller was local so I saved on shipping and did local pickup. The Niles amp was free from a customer, he was moving and didn't want to take all his audio stuff with him.
If you hit the thrift stores (some are definitely better than others), scan ebay, troll craigslist, you can often put together a very impressive system for less money than you would ever think possible.