Wow, I finally have time to comment on this. Here's my take on Hartke vs Ampeg. I'll try to be as un-biased as possible too.
I deal with this almost on a daily basis because when I'm doing in store trainings, most of the stores I visit carry both lines.
Bang for the buck, Hartke really does make some cool, cost effective stuff, and it does work really well.... most of the time. If you do have warranty issues with any of their gear though, it's a crap shoot on how long it'll take to fix it. I know this first hand from my retail store years. I used to cringe when I'd see a Hartke come in for warranty repair. If budget is an issue though, Hartke is a great way to go.
Ampeg on the other hand offers some great cost effective gear too, and you still get the Ampeg name and service. In my opinion, I prefer the Ampeg sound over anything. I've been using their stuff long before I joined the family too. I remember 15ears old, hauling an SVT and an 8x10 cab around Boston.
I've owned and played all of the above mentioned Ampeg gear too.
Jeff, the SVT 5 Pro is basically the same thing as a 4 Pro less 2 12AX7 in the preamp. Instead of having the graphic EQ though, it has a hot-rodded distortion and octaver in it's place. Plus the wattage is little less on the 5 Pro. 1000watts vs 1200watts. SoM, if you can grab a 5 Pro for under $900, DO IT if you haven't already.
Right now I'm using the B-5R, the solid state version of the 5Pro with two of the 2x10 PortaBass cabs for portability reasons. My big rig is still the all tube SVT with an 8x10 cab though.
Mike, have you contacted anyone at Ampeg regarding your issue? I'm not sure if using your DBX on the Pre-out/Power-in is a good idea. By doing that, you're disabling the preamp of the B-2 and inserting the DBX in it's place. Then coming pre-out, sending the signal back into the DBX.
Let me know, or like you said, just go with an F-1X and solve all your problems.
Peace,
Dino