B&K preamps Pro 5, CS 117 verses Hafler DH 110

Cant speak for the Hafler, but the Pro 10 Sonata was better than 117 to these ears (owned both).

I had a B&K MC101 (basically a Pro 10 Sonata with tone controls that can be bypassed). It did have a separate power supply and really impressed me with build quality, and good sound quality relative to price - $250 used.
I agree with the above comment - not last word in sound stage or detail. However, can't be too critical given price point. Throw in an Emotiva XPA-200 amp and some older M series Mirage speakers and you have a very decent system at bargain basement prices.

Owned a Pro-10 from 1985-2010. Sold it here on AG for $225 when it was time for a new system. Never a problem and sounded great with MM/LOMC capability.