Would this be an upgrade?

I vote for Cardas

I also agree that the Cardas would be a step up from the Monster.

I used the Quadlink speaker cable for a few years and always enjoyed the sound it gave me.

I am currently using Cardas Neutral Reference in my system and have compared the two as I have some Monster cables laying around, and there was a noticable difference in clarity and detail with the Cardas ic's, mostly the clarity.

Other than the words "Moster Cable" on the sleeve, the 2.4's are actually a pretty good pair of speaker cables and should be fine with your Tylers. I would take the money you were going to spend on speaker cables and apply it to better interconnects. Cardas Quadlink is ( at best) a sidewise move - the 2.4 Monsters are closer to the Neutral Reference in performance, in my opinion.

Thanks for all the replies so far. The reason i asked is I thought this might be a sideways move also. I may have been caught up in the name game.