I had a BF2/64 for a little bit and ditched for a MHDT Labs Atlantis. The BF2/64 just sounded a little etched and overly analytical. While fun and very detailed, I couldn't listen to it long term. I even tried modding the opamps to Burson V6 but they didn't quite fit in the case all buttoned up. I would have had a giraffe in a convertible leaving the case open.

I'd say you'd be better off with an Aegir and a different dac if you were still set on Schiit amps. Now that you have very very detailed speakers, a BF2 may be a bit overkill.
For my HP filter, I used Miflex KPCU01 and fit the caps into my preamp case. My preamp has 2 outputs, so I just bridged the cap between 1 and 2 and had sub out on 1 and speakers out on 2. When I put them back, I'll snag another pair or the KPCU02 once I know the values I need for my pairing with my next amp build.