I'm with you on the 334. I've had my pair since July 2012, and am still highly satisfied (that duration has never, ever, happened with any other piece of portable audio gear I've owned). Granted there are a few high end earphones I haven't had the chance to try still (such as the 1plus2, Kaede/Kuro, Fischer Amps FA-4...), but I doubt they'll pull me away at this point. I had a chance to demo the ASG-2, and despite all the current buzz, I didn't hear them as a challenger to the TG334. I think it'll take something pretty extraordinary to cause me to sell them. Unfortunately I'm not in a position currently to purchase all the IEM's I'd like to hear, so I doubt the necessary comparisons will get a chance to happen. But maybe that's a good thing for my bank account. I'm running the Starlight cable as well, and Ortofon tips.
Methinks you ought to make some time to check out the K3003