Considering A SS amplifier

Are you judging the sound of the BHK 250 based on the sound you get when paired with your Halcro DM8 preamplifier alone?  

Have you demo'd other preamps with your BHK 250?

The BHK 250 is a nice amplifier, particularly when paired with the right preamp and speakers.  Triode tube front-end with all-MOSFET circuitry.

Might be worth saving, finding the root cause issues (likely in other parts of the system), rather than making a knee-jerk reaction to dump it and try other amps to realize the same result yet again. 

@neonknight 
So far I have used it with the matching BHK Signature pre amp, along with one from Edge, and a passive from Placette Audio. So far I prefer tbe Halcro. Also ran a dozen tube chouces through it and the Telwfunken work best. Cables from Wireworld, Tara Labs, VH Audio, and Analysis Plus Silver Apex work the best. Power cords from PI Audio Group, Wireworld, Analysis Plus. PS Audio, and ZU Audio.

The amp sounds good, but just too soft around the edges foe me.

Well, you certainly gave it quite a chance, all the preamps and even AP Silvers you tried - was gonna mention those but you already did that. PS does offer a tad more laid back sound and presentation IMO. You tried a lot more than most do to find synergy.  Not for your ears and preference maybe.  Best of Luck on the next steps.    

@neonknight
The only other consideration I got is speaker wire. Use Wireworld Eclipse Series 8. But need an 8 meter run so thats not a cheap test as I cannot find a run of that length on the used market.

8M is quite a run IF your PSA/BHK amp is already on the side of "soft" sounding. Rule of thumb to keep "speaker wires as short as possible" for home hi-fi, in general terms. Agree with gndrbob. Might be a culprit, or enough so to round things out a bit. A few questions.

1) I see those WW ES8s are OCC, "9AWG", are they standard or quad (bi-wire) speaker cables?

2) For a brief 1hr test, can you maybe move the speakers super close to the amp?

TEST:
Before you do, warm up amp, play a familiar track. Index volume at 10, 11 o’clock or whatever your normal listening level is. Make notes on what you hear with highs, mids, lows level of detail. Then power off, swap out speaker cables for super short runs.

Simple, cheap and crude test, won’t sound great, but this will confirm it quick. Go to Home Depot, get some wire to cut. Some use regular orange AC extension cords and cut them in half and strip.   Or locate the infamous 18/2 or 16/2 Brown Lamp cord (just for the test). Cut them at 4-6’ max length. Single or Dual-run cords if you can bi-wire. Move speakers close, 4-6’ from amp, 4ft better. Twist bare wire connect with no connectors if you have screw-in terminals with holes or wrap/pinch well - if doable.. Any difference, at all? Brighter, but grainy? Listen for louder volume output at same 10’oclock volume level, louder? Make notes, report back. Worth trying, cheap to do a quick test before buying other amps.

@neonknight 
..I seem to recall that long speaker wire is more preferable than long interconnect runs...

XLR interconnect cables are specifically designed for long runs. The test was to validate it so you could rectify the situation, "loss".    

Would you entertain "speaker wire length advice" from the CEO of PS Audio, the guy who partnered with Bascom H. King to design and manufacture your BHK amplifier?

Video:
https://youtu.be/Xd8JYfiKp3c

by Paul McGowen (CEO) of PS Audio, Manufacturer of the BHK 250 amplifier.

Quote: "I now run the opposite: short speaker cables and long balanced interconnects."

https://www.psaudio.com/pauls-posts/long-or-short-cables/

@neonknight 
"..But need an 8 meter run so thats not a cheap..."

"There is no way to move the component rack between speakers to shorten speaker wire runs..."

"love/hate relationship with wiring"...

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"other" amps are not going to resolve loss with "8 Meter" long speaker cables.