About to purchase the Kef LS50W speaker want opinions about set up....

Thanks for the report! A good friend listened too them last weekend and was blown away! Until he told me about them. I didn't know they existed. Lol
I've been reading as much as I can on the easiest way to feed them. I'm probably going to start with a PC/HD as the source.

Just got the ls50 passive...wonderful little speaker indeed.  I also have experience with active, dynaudio bm5a, and what i didn't like about it in the long run is that i felt they were under-powered, and i wished i could have driven them differently.  You no longer have the possibility to try tubes or ss...If you have an amp problem, the all speaker has got to go, the little amps om the back do not feature large toroidal transformers, etc...things to consider.

I would just make sure you purchase them from a place that allows for easy returns.  While the LS50s do a great job tonally, they are somewhat sensitive to placement (to get the best sound) and without the right placement, you are more likely to end up with a 2 dimensional soundstage that will be disappointing over time. 

You can purchase them from Magnolia this n Best Buy, they sell it and have a 15-30 days return policy depending on your point status. However, I am sure you will keep them they are that good! 

Congrats on your choice Matt!
I heard the LS50w in Munich High-end society, right after I auditioned the KEF Muons. I could swear, the LS50w were every bit as transparent as the Muons, if not tonally better. The bass of the Muons in that room overwhelmed the midrange.

I own the passives and their midrange is a work of class even with my DIY amp from the 80s. I tried a couple of amps on them and this is a speaker that will make the amp differences easily audible.
The only thing that I miss on the passives is a little more bass thump. In my room (5m x 7m) the midbass is a little lean and the subwoofers don't help there. The extension is very good even without subs.
That's why I want to change them with the LS50w hoping that the DSP and the bass adjustments can produce more midbass. Another very important reason for me is convenience. 90% of the time I stream music.
Can anyone owning both have a word how do they compare in the bass department (not just extension, but weight and subjective feeling on the amount of bass)?