I have a complete Kef speaker setup - Q7 for fronts, Q9c for the centre and Q4 for surrounds and KHT 2005 for rears. Also use a Kef Model 30B 12" 100 watt powered sub.
My first system (25 years ago) consisted of Kef Chorals and Kef 104. Used these until last year when I upgraded and expanded the system and kept with Kef.
I drive the system with a Yamaha RX-V2500 using Pioneer 667 DVD for DVD, SACD and DVD Audio, a Rega P3 TT and Nad c542 for CDs. All sounds excellent.

I Listen to the Nad c542 driving the Yamaha on pure direct mode driving the Q7s quite a bit.
The KHT series gets excellent reviews and are way better than Bose in terms of build quality and performance.
The Q series Kefs use UniQ driver technology which positions the tweeter within in the centre of the midrange driver – gives a wider “sweet spot”. See
www.kef.com for more info.