It is time for me to fess up as to how many Riv's were (until recently) in my garage: 7. I ride a Waterford Atlantis, a Waterford Hillborne (rare canti/double TT 56cm), a Simpleone, and I recently sold a Gomez and a Clem H. My wife rides a Cheviot and an Appaloosa (both are in my size range). I rode the Clem H for 5-6 years and every time I rode it I thought "I just don't love this bike, but it is the bike I ride the most (commuter)." I ride a 58cm traditionally sized bike and found the 52 Clem H just never fit right (too small). The 60cm Yves Gomez was too big and never felt comfortable. Much like you my dream bike (since 2004) was the Atlantis. I've had mine for 4 years. If I only could keep one bike, it would be the Atlantis. I am not as fond of the long chainstays as others here are, but I have ridden them and didn't think they are bad, but I prefer the ride of my Hillborne and Atlantis (and sometimes when my knees are feeling okay the Simpleone). If you are into bikes and dream of different bikes and spent crazy amounts of time looking at bikes (and parts!), thinking that X bike will complete your bike quest, then buying your dream bike now may not truly satisfy your hunger. I bought, rode, sold, traded, gave away many bikes on my journey to my current stable, which is perfect for me. But if I'd started way back in 2003 (when I got into riding as an "adult") with this bunch of bikes I likely wouldn't feel the way about them as I do now. I don't know what the answer is for you, nor does anyone, really, but you can't go wrong with any bike that fits you and you enjoy riding. Plus if you score a Clem on this list, it will still be worth what you paid in a year (maybe more?!), and folks on this list are always up for a "new" bike.
That was long winded and didn't answer your question. The Clem H rode slow and fat for me (as I am slow and fat), and it didn't fit me right because of the huge gap between sizes. The Atlantis (original style) rides much more like a traditional touring bike (stable, easy handling), which I prefer. I rode a LHT for years and the Atlantis rides more similar, though much better, that that. The bikes were set up with upright bars (though the Atlantis now has wide drops, which I prefer).