@Jonabrim It's a fun problem to have, isn't it? I am with others that replied about adding the subwoofer first and seeing where that leads you (though I disagree with others regarding the REL sub for a music-primary system as I think it would be a good option).
If you are used to the Focal Be tweeter and enjoy its presentation, going to a manufacturer like, say, KEF might be disappointing. Case in point (and would be something you may like to try for fun): I went to a Best Buy Magnolia to listen to the KEF LS50 and find out what all the hubbub was about. The salesperson first played some B&W speakers (the older CM line, not the newer 7 series) because, well, that is what
he liked. We then switched to the KEFs and they sounded dark and closed in. They are not - it's just that the B&W tweeter was that much more elevated in compo. I'm not saying Focal is bright by any means - they just have a different sound signature. You asked me about my new Choras on the other thread ("official" review coming someday...) and the first thing that comes to mind is "lively" and pleasantly so.
That being said, and if you have $5K to burn, I believe the KEF R11 is one of audio's absolute bargains right now. They come within whisper distance of KEF's reference series, are big, bold and, as far as music is concerned (unless one is a pipe organ nut) no subwoofer required. Even though I would like to explore the Focal upper reaches, if I had the cash on hand, I would get the R11s and be done (for now...).
Also, I agree with your assessment of the Dynaudio Special 40: they are awesome speakers but can definitely sound polite until one gets used (aural break-in) to their sound.
Edit: Looks like KEf has raised their prices of the R11 to $5,500. Oh well, another dream dashed...