There was a review of MB Quart QS components on pasmag. They got good review, but beware that pasmag seems to give good marks to every piece of hardware they receive.. so I'd take it with a grain of salt. The sound was described as "clinical", whatever that means. JBLs MS-62C components have been getting pretty good reviews, so you may want to check them out. I really like the sound of Hybrid Audio Imagine, which may be in your price range, but they need to run with "active" crossover to sound best if you install the tweeter separately from the woofer. HAT Unity may be better as they use a more sophisticated passive crossover setup.
I haven't heard Focals, but their Polyglass speakers, like PS 165, seem similar to Hybrid Audio speakers in design of the woofers. In both cases a woofer cone made with processed paper material is expected to play into hih upper mid-range frequencies (much higher than say carbon or metal woofers). The tweeters are different. The HAT tweeters are silk. The HAT tweeters sound smooth if you high pass them really high, like 5KHz or higher. The Focals are metal dome. People seem to have love or hate relationship with them. The interesting thing about PS 165 (the cheapest Polyglass speaker right now it seems) is that you can run them in bi-amp mode with stock crossovers. I heard Focal speakers are sold much cheaper in Europe, so if you ever visit France it may be a good idea to buy a set of higher end Focal speakers. I wouldn't discount all metal tweeters as "bad". I heard briefly the Seas Neo Aluminum tweeters. I thought they were detailed and smooth.