Update time: I brought my test CD to the store and the owner had a pair of Studio 20s (no 60s, they didn't have them there) and a pair of SE3s just like mine in the listening room. After I listened to a track I noticed the left and right imaging was backwards and told them about it; they checked the connections on their Parasound CD player and realized they had connected the left and right backwards, and had it summed to mono (whoopsie there guys, as my boss would say "that should've been caught, the client shouldn't be catching these things!"). After that was corrected I started listening back and forth between the 20s and the SE3s.
The 20s definitely had more "air" and better midrange detail. The SE3s have detail but adds some harshness. After telling the guy I live in a condo with a medium-sized room, he talked me out of buying the Studio 60s as he said the midrange driver offered in the studio 20s is better. I ended up getting the 20s (had to order them, said it'll be 5 to 8 days) and the CC-590. The 20s could hold their own in the low-midrange department during my listening of my CD, and I'll be crossing over at 80Hz with my Emotiva sub anyway, so I don't really need all those woofers the 60s have. I'm buying for better midrange/high-end detail.
I would've loved to hear some Salk towers, but I always like hearing speakers first before I put money down, and I would've felt guilty shipping speakers back to Salk if the sound wasn't quite what I was looking for.