Recondition my 1986 Thiel CS1.0 or buy new?


I have a pair of thiel cs 1.0's that I have had since 1986. They are driven by a Marantz pm7200 (which I find very satisfying especially in Class A mode) a Project III turntable and a Marantz 6004 cd player. I can get the speakers audibly reconditioned by Thiel with new grill cloths for about $400 including shipping. Visited my local hi end audio store, and the salesman, whom I trust, said that technology in speaker components has changed dramatically over the last 25 years. I listened to a pair of monitor audio rx6 (list for $1250) liked them a lot found them warmer then my Thiels but probably a good matchup with my electronics. The store will allow me to bring there demos home overnight. Any comments or suggestions?
raya
I have been trying a variety of in-home demo's compliments of my local audio stores. Last night I brought home the new Monitor Audio RX6. I am glad I did, was getting ready to keep the Thiels and go with a Sub. Simply put, they weren't just a little better then the Thiels. They were a lot better. Highs were more refined and laid back, with more resolution and micro detail. They had none of the grittyness and fatigue I get from the Thiels. Midrange on the RX6 was more open and detailed, which was a surprise. I heard fretboards and fingers across strings and hands on bongo's I had never heard before on recordings I had listened to 100's of times on my Thiels. Bass was definitely more extended, tighter and more controled. I estimate the RX6 go down to 40HZ (literature says 38hz, probably at -5db) Thiels rolloff was 50hz according to old literature. Bass was substantial enough to omit the need for any subwoofer. They were also more effecient, easy to drive, and very forgiving when pushed.

FYI I have also listened to the following Totems (ARRO, Dreamcatcher, & Rainmaker, great detail and imaging, very lacking in what I call the slam factor, need a sub) B&W 684 (I don't get it, very neutral but boring, gave me no excitement, almost thin) Paradigm monitor 7( I have other paradigms for our surround sound in our family room, great for movies but present there own set of problems with music, especially the upper midrange)
Raya a friend of mine owns the Thiel CS1 and they are nice but I think a bit too laid back in the high end, they seem to lack presence.

I did not want to mention this before...
Thanks. It did end up costing more than 3 X the $400 repair to upgrade. I can certainly understand the extended bass being an improvement. The CS 1's are bit light down there and it draws more attention to the tipped up nature of those speakers. I hope you get much enjoyment from your new speakers!