A big x2 to singleended58 and his suggestion of RWA iMod and ALO cable. I have two of these rigs, down from three (I sold one, and the buyer is thrilled).
Vinnie and Ken do great work. And they support Head-Fi big-time. Vinnie always comes to the NY/NJ meets, and contributes financially, beyond all expectation (one year he bought everyone lunch at a fancy hotel, cost him more than a grand, I understand).
Of course that is a reason to like him, not to buy his gear if the SQ were not top-notch. But it is. Beyond.
I use my RWA 5.5 Gen iMod + ALO cable with an iQube pocket amp. With lots of different supra-aural cans that fold flat -- beyers, utlrasones, audio technicas, and I used to use them with Shure 530 IEMs. Sold those, saving up now for JH13's. The second one I use with a number of portable amps -- RSA, Mini^3 ... have the new powerful pico on order from Justin.
RWA + iQube is SQ to die for, all using lossless 48K ALACs. Typically I rip DVD-A's at 96K, then half-sample with SOX and anti-aliasing to get the 48K ALACs. Lots of members here helped me get this just right. Sometimes I use a vintage PS3 to get a 176.4K LPCM down-convert of DSD off of SACDs (newer PS3's won't do this, but AudioPraise Vanity and others have ways to get 88.2 ... my Wadia CDP does this). I also use SOX to down-covert these, but I worry that it is a more complex sampling procedure than 96 to 48 ... nonetheless the results are excellent.
Members who have heard, for instance, Metallica "Sandman" or other tracks have their jaws drop open. Taking in to account my high-freq hearing loss (age 63, and I have it measured frequently at an audioloigist so I know exactly what I am facing), and understanding that "percentage" is meaningless here, I will nonetheles say that RWA + iQube hits 85 to 90% of the quality of both my Orpheus HE90/HEV90 and Kerry BHSE + O2 007 Mk1. (Of course I only faintly remember the latter since Kerry has the BHSE back in his shop ... Kerry??). SIngle female vocals on the top rigs still outshine the portable, and large symphonic and opera recordings of course are amazing on the big boys ... but for today's pop and old-school album rock (except for the most complex prog rock stuff), there really is no difference. (Live recordings, especially in big venues, do better on the big rigs).
Buy an iMod from RWA.