I've had a Trek 520 for some time. I can't complain about the way it rides, but I have to admit the TIG welds look a bit plain when compared to lugs.
A few weeks ago I bought this mint, virtually unused, 1996 Bianchi Osprey MTB for $AU100 (About $US90).
http://cgi.ebay.com.au/ws/eBayISAPI....=STRK:MEWNX:IT
It is a full Tange frame with lugging on the main frame, and now wears a set of Continental Super Contacts, WTB saddle, Shimano M324 reversible pedals and Topeak rack that I had sitting in the garage. It rides damn nice.
I have a slightly used 105 triple chainset in the garage ready to install. I have to make some decisions regarding handlebars and shifters. I'm inclined towards Albatross bars, Tektro drop brake levers and Ultegra bar cons. Add fenders and I'm done. Eventually I will replace the 7 speed drivetrain with something newer, but I just can't justify throwing away something that's virtually N.O.S. just for the sake of a few more ratios.
So, I'll wind up with a very nice, light, and comfortable cro-mo commuter for about $300 all up.
It won't say "Rivendell" on the down tube, but it does say "Bianchi", which isn't all bad.
In fact, if I add up the total cost of buying and refurbishing my 3 steel bikes (2003 Trek 520, 1996 Trek 370, 1996 Bianchi Osprey), all of which are in very good condition, I'm sure I have spent way less than the cost of one Atlantis. And while all 3 bikes do most things just fine, each specializes in doing certain things better than the other 2, so I can choose a bike perfectly suited to whatever I'm doing.
If you can afford to slap down $3,000-$3,5000 on something really nice like an Atlantis (complete), and feel comfortable about it, then do it. But for my money there are more efficient ways of spending that kind of coin.