Kappa 9 vs Martin Logan Quest Z

Thx for all the advice, I read it all and will read more too when/if any more appear here...

So (Thesoundhouse) what about a K8 and Quest Z matchup ?

I'm tending to go outside the box this time, but we'll see. I've had Magnepan MGI (they had a 'nasal' sound in a narrow band of the voice freq range, a little similar to the L100's I have/had) MGIIa, and have some SMGa's too. Many other box speakers too...ready to try the Quest z's I think...

I think I've ruled the K9s out, if at least only because I have other 'worthy' box speakers like Infinity Crescendo 3009's, Vandersteens, RTA15TL;s, NS-500M's, AR9s, 240Ti's, L100's (4 sale here) etc etc...and I also have SMGa's and MGIIa's...I'm just experimenting, looking for a better sound than last week...I have way too many speakers here, but I'm having fun experimenting with them all...

Today's addition to the short-list of what I'll buy next are: Thiel CS3.5's.

Well, I have to admit, I have Vandy 2C's and 3's, no 2Ce's though they are available locally. I'm going to hear the ML's today...I wonder if the muddy-bass issue will show up for me...I'm not real big on a lot of bass, but I think I know muddy when I hear it. I've had some McIntosh XR1051's, and I thought they were very good, non-fatiguing, but muddy bass.
The CS3.5'sa re a drive away so I won't hear them for a few weeks at best. I'll report on what I hear today...

Ok, upper lows, mids, and highs are SUPERB. The bass is, like some write/say, muddy. Can that be fixed ? Maybe I should start a different thread ? I have to admit, I have never used a sub before, so I'm not sure how they work...