Quick update: Upon further listening, letting my DAC warm up ( MH 25.2, still not broken in ) I am completely blown away by the set up. I've been AB testing both the headphone outs between the gilmore lite and the MH 25.2 and found that so far there isn't a HUGE difference, what it is doing is making the HF-2s sound a lot more effortless, It's hitting the lower notes easier (if that makes sense) with more power and punch and theres just a touch more resolution, separation, and and punch across the entire frequency.
As I was listening more and more I loving my new set up I decided to A-B test against my all time go-to headphone the SR-225. Since I first owned the SR-225 7 years ago I have owned many many other headphones; 60s, 80s, 125, RS-2s, RS1s, Senn 600s and a few pairs of AT's. Every other pair I found great things about, but it always ended up with me selling off the other and going back to the SR-225. After the HF-2 I can very confidently say that the 225 is gone forever for me. I loved the punch, rythm and detail in the 225. It was great for any rock, pop, rap or really any thing else that I could throw at it. It kept me moving, awake, entertained and motivated while I work, 8-10 hours a day, 5 days a week. AB testing between these two headphones showed that the HF-2 with the Gilmore Lite amp had all of the detail and punch that the 225s have and so much more. I feel like the HF-2s get everything that the 225s have and then add everything that I loved about the RS-1, with out being quite as dark and relaxed sounding. It renders the texture of acoustic guitar and multi-layered synths so perfectly and effortlessly. The only negative thing I could say about the HF-2 in comparison to the 225s and RS-1s is that the soundstage seems much smaller. Some how the separation is still amazing with pin-point accuracy, but everything sounds much closer together.
These impressions are after just about 10 hours of listening and should clearly be taken that way. I'm waiting on a new tube for my DAC and then want everything to burn in for a few weeks before a real full review but as of now, I have never been this impressed by any set of headphones or headphone / amp combination.