It really depends on your musical taste. Personally, I fine the Electra series to be fairly neutral in the midrange but a bit bright on top. Using Krell might give you too much brightness. If it were me, I'd consider a pair of Electrocompaniet AW220s, or maybe the Pass XA200 monoblocks if you can afford them. In terms of an integrated though, you're going to be hard pressed to find anything with enough power for your room, so Krell may be the way to go.
Best of luck.
Best of luck.