Thanks again everyone. I Listened to Definitive Technologies Mythos STs and they sounded very good indeed. I also Listened to B&W 802s ($7,000 ea. GULP!) since they had no 703s for me to put my ear to. The B&Ws sounded good of course but the sales guy didn't turn them up that much so I didn't get the chance to be really impressed by them.
I then went back and listened to The Paradigm signature S8s and the Studio 100s again and this time I fiddled around with their placement and was much happier with the results. The signatures took everything in stride regardless of how loud the sales guy was asking them to play. Very nice! Pink Floyd's Dark Side of The Moon SACD was played over the S8s. The salesman allowed me to listen for as long as I wanted and told me I could come back anytime and listen again to whatever I want for as long as I want. I thought to myself now that is how it should be but we know it isn't always that easy.
After the S8s impressed me I thought I might be let down by the 100s but no way! The Pink Floyd SACD wouldn't work in the room the 100s were in for some reason so thankfully I had my Led Zeppelin "How The West Was Won" DVD-A with me. The 100s completely rocked out LOUD. The salesman was not shy with the volume. Very large soundstage and the instruments sounded right and powerful. I listened to the entire 19:20 min "Moby Dick" track off of the second disc and the extended drum performance kicked some serious butt! Each boom, snap, pop, bang and crash was reproduced at high volume without any detectable distortion or nonsense. It just sounded incredible. I could detect that the S8s maybe had a smidgen more clarity at very high levels but other than that I don't know if I heard a real significant difference between the two. I mean if I had the extra dough to throw at the S8s I would do it more so because I could and for the nicer finish. I don't think it would just be the difference in sound that would sway me towards the S8s. Again, my philosophy is buy the best you can afford of what you like so simply because 1) I really liked them, 2) appearance wise they look fantastic to the 100s merely good and 3) because they're the top of the line I would buy them if I had the "extra" cash. The difference in sound quality alone isn't enough for me to make the leap to the much more expensive S8s.
I don't have the extra cash so it looks like its going to be the 100s for me as well as the CC690 center channel and the best part is I don't feel like I'm shortchanging myself at all. I'm getting all 3 at a 20% discount to boot. I can't say that the Studio 100s are the absolute best sounding speaker I've listened to in the last two weeks but I can say that even the $1,000 more expensive KEF XQ40s didn't impress me enough that I would choose them over the 100s. For me so far the 100s have it all. The best all rounder as some reviewers say when reviewing cars. I can say that they are very close to the best I've heard so far (for a good chunk less money) and they have the look I like best and also what I think is the best center channel to match them.
The Signature S8s were powered by a 200 wpc Anthem power amp
The Studio 100s by a 140 wpc Denon 4806 or 4803, I forget witch.