i need opinions on wich one would be better
mb quart psc316
focal polyglass 165v3e
just looking for opinions as i never used focal

Have you heard both sets? They do have a significant variance in sound quality. It all will come down to personal preference. I have run both Quarts and Focals, and I prefer the smoothness of the Focals. I find the midbass on the Focals is much more present as well.
The Quarts are still a fine speaker, just much different from the Focals.
Be sure you are able to listen to both pairs so you can gain a preference.

Yeah, I agree with fat... quite a difference, no doubt. I, like Whacker am also a bigger fan of Focal, but Quart makes nice speakers too and some people are definitly more than happy with them.

both good, audition both before purchasing

I'd choose...Focal..I heard them the other day on an alpine amp..wow ! clear is an undertsatement.

some other sets to consider:

DLS
CDT
JL Audio
AVI

heard them both but they were in different cars, but i did like the quart better because of the tweeters.

Yikes! you liked the quart tweeters? did you have bondo in your ears?

:D

LOL....I was thinking the same thing. The only reason I DIDN'T buy MB QUARTs were because of the tweeters.

The MBQ tweeters always get noticed (love'm, like'm, or hat'm) they always force an opinion!