I meant to post my impressions earlier but got kind of busy once I got back to Dallas. I really appreciate our gracious host for providing the space and the kindness of our fellow Head-Fi'ers for bringing and sharing their treasures and making an out-of-town meet newbie feel welcome.
For me the most surprising thing, and what I think I ultimately will take the most from is the experience of getting to hear the amazing difference a truly superb DAC makes when paired with top-of-the-line headphones and amps for a FLAC-based laptop setup like mine. Specifically, what struck me was when I was able to listen to the same song on the LCD-2 connected to the Cavalli Liquid Fire amp first directly connected to my mediocre E-mu 0404 as a DAC for my Asus laptop FLAC setup. (Though to be honest I didn't know just quite how mediocre the E-mu was until shortly later) Then we disconnected the E-mu and tried the same setup but with the Spitfire MKII belonging to rcs5. It was noticeably better but I knew the DAC was still the weak link in the chain as I had had a taste of what the LCD-2 could truly sound like previously on the Peachtree Nova/JVC XL-Z1050 CDP setup belonging to bbophead. The real light bulb went off when driftingbunnies (Ben) was kind enough to bring over his DAC, the Cullen Modded PS Audio Digital Link 3 stage 3. That setup of headphones, amp and DAC played my drum-n-bass song (Noisia's "Sunhammer" feat. Amon Tobin) like nothing I've ever heard and truly blew my mind for a few glorious moments. Every aspect (phenomenal bass, mids, highs; each instrument, each note) of the track I chose, which I consider to be one of the most complicated and intricate electronic pieces of music in my collection, was brought into perfect harmony with no element lacking in any way I could notice. Moreover, I realized how absolutely vital the quality of the DAC is when listening to equipment of the caliber of LCD-2 and the Liquid Fire. Needless to say I'll now be looking at either an AMP/DAC that suits my purposes or a much better stand-alone DAC when I get around to pulling the trigger on a new rig.
Other impressions I had I'll try to keep brief- My AKG K240 Sextetts sounded surprisingly good with classical music (violin concertos specifically) paired to rcs5's Spitfire MKII and Schiit Valhalla. Since the Valhalla was already on my short list of future amps this made me very happy as I listen to quite a bit of classical as well. Would love to hear what that setup could do for the cello.
The Peachtree Nova sounded fantastic with both the LCD-2 and HE-5LE, but I found I strongly favored the LCD-2s. Additionally, I was delighted with the "tube off" button. Depending on what I was listening to, it really had a noticeable difference too; some songs I found I enjoyed more with the tube on, some without. That's a really cool feature.
Morbid's D7000s sounded much better to me on his mobile setup than I remember my previously-owned modded D5000s and stock D2000s ever did. That was unexpected and delightful.
One other impression I got was that I strongly favor the sounds of the LCD-2 to Sennhesier HD800 (not in attendance obviously but which I've had ample time to listen to)
I was also glad to see my faith in the little digiZoid ZO vindicated by a couple folks who gave it a listen. It really does shine in a way that has to be heard to be believed. But of course some rigs and indeed some types of music likely wouldn't benefit from it nor would I ever think to apply it, as in the case of the LCD-2/LF/PS Audio DAC setup.
I would post pictures but Ben did such a fine job and I'm not really the photographer in the family, so I'll leave it at that. (Hey Ben, maybe you can give me some lessons some time
Finally thanks everyone for such a great time.