This is a hard one for me Dan. I voted for a mic pre but am interested in others. Here is a short list with my reasons....
1. My number one item would be a mic preamp. There are plenty out there available, but this would translate well to a kit. I would want something that has a very clean user selected drive voltage and gain. I want something that sounds good, but could be used with a variety of mics. I'm not going to own the caliber that Jim works with any time soon, but the Shure KSM 32 and KSM 137 are on my short list as are other LCD and CD mics.
2. I really like the idea of a nice DI. The problem is that you have decent competition out there. A few of the requirements needed for me to even consider it would be:
a. user selectable voltage taps. I would need to switch between 100v, 120v, 220v depending on location of the gig.
b. Adjustable input impedance tap. My Line 6 POD HD has this and It's something I don't want to live without again.
c. Effects loops and pedal input (e.g. volume pedal, wah wah, etc.)
d. A broad EQ ability from clean to impressive over-driven distortion.
e. SE to Stereo output and stereo to stereo output ability with both SE and balanced output with low noise.
f. It must play will with mixers, direct to powered monitors and class D amps driving cabs.
This is a tall order for a user built item but the competition is impressive out there.
3. A HP amp would be a consideration, but it would need to sound at least as good as your Paramounts/Kaiju systems. If not, I would rather build a system to these amps vs. compensating for inefficient speakers.
4. A synth unit. Can you tell me what this would be?
I'm getting more and more into analog synth sound generation.
Thanks for taking it to the customer! Your products have defined how I enjoy a majority of music and I'm open to new areas.