Nice!!! Sounds like a great complement to your HXDA.
Awesome Les! I am glad you are digging the amp. When I picked up my DG at the Experience this year, I got to talk to both Doug Sewell and David Grissom for a little while about the amp. They both agreed that the amp really shines with a clean boost at the front end. It sounds like you have already been playing around with different pedals to see what works. It really takes pedals well does'nt it!
That's the main draw of the amp for me... I'd like an empty one with a couple of empty cabs and a POD.
That's fantastic, Les! Nothing feels better that a well researched GAS target, acquisition then confirmation that it was the right choice. Congrats. I have no pearls of wisdom with these new DG amps, directly. TAJ and Aristotle have you well covered.
I'll throw this out there to ponder, though: how close is the 30w DG to any other PRS production/CAD amp? Tonally, to my ears, the 50w version sounded a lot like the Super Dallas (one of DGh's favs) camp (and I meant to ask Doug). Why do I ask? Well, because a lot more mileage is on the Super Dallas than the DG 50 and if they come from the same camp, gear that works well with one might work with the other. Is the input stage of the DG30 similar to the Sweet 16? If so, some of the pedals known to work well might be worth investigating.
Expansion on that thought: the Klon KTR sounded stunningly great on Martysnarf's Sweet 16. Paired with an EP Boost it was impressive. So much so that I recently (as in yesterday) built a Klon Centaur clone for my Super Dallas. It's insanely amazing! Like it was made for the amp. So if that works well with those two amps, one could deduce that it might work well with their (supposed) cousins. Right? So in a very long winded way, I suggest you look at one of the low gain OD pedals out there, especially a Klon variant/clone or similar.