Since you say music listening is 75% of the time I can't stress enough the importance of doing diligent auditioning of the left and right speakers focusing on midrange and upper frequency realism. You may even prefer the presentation of center channel speakers.
In my experience mixing speakers even from the same brand and series unnecessarily complicates the surround effect. When I upgraded from a dipole / center 5.1 to a matching 7.1 system the result was incredible. In the process I located the speakers as close to the same ear level elevation aid distance as possible. This effort required much less room correction which greatly aided in the surround effect and made multi channel recordings sound morelike a real concert.
Your choices of Def Tech and Klipsch seem to be easy loads for a receiver based system. Another suggestion would be Triangle from France.
I'd choose two sealed subwoofers and locate them by using the crawl testing method. I have yet to find a room were the subs sound better in corners behind or next to the main speakers, so far. Good luck and have fun.
In my experience mixing speakers even from the same brand and series unnecessarily complicates the surround effect. When I upgraded from a dipole / center 5.1 to a matching 7.1 system the result was incredible. In the process I located the speakers as close to the same ear level elevation aid distance as possible. This effort required much less room correction which greatly aided in the surround effect and made multi channel recordings sound morelike a real concert.
Your choices of Def Tech and Klipsch seem to be easy loads for a receiver based system. Another suggestion would be Triangle from France.
I'd choose two sealed subwoofers and locate them by using the crawl testing method. I have yet to find a room were the subs sound better in corners behind or next to the main speakers, so far. Good luck and have fun.