After much agonising, I have just bitten the bullet and ordered a Headzone amp, which I will be pairing with T1s. I had to buy an amp for the new T1s anyway, and given current pricing and favourable exchange rates, I could either have bought a dedicated amp, or for only $200 more, the Headzone. Given my usage habits run TV/movies -> gaming -> -> -> -> -> music it was a relatively easy choice.
This is, of course, meant primarily for use as a home theatre system, and is the reason I could justify the cost, as I am currently making do with inbuilt TV speakers, so it was either a proper surround sound amp and 5.1 speaker setup, or headphones - the choice then boiled down to a very basic speaker setup, or a top of the range headphone setup for the same cost...which isn't really a choice.
However it will (of course) be pressed into service as my new gaming solution - and I hope it will represent the 'Holy Grail' (it had better ). Once all the gear comes in (which could take a few weeks), I will post my impressions. While most people are unlikely to make this level of investment for their gaming sound, it happens to work for my particular circumstances, and I may as well give what feedback I can in case anyone is thinking about it for themselves.
I am very interested to hear your impressions of the headzone. Keep us posted!