Most of the people here love the T1 of course. For it's retail price, I would have passed, but for $80 used, this thing is really worth every dollar. I've rolled several tubes with it and they really helped me achieve the kind of sound I'm looking for. I was expecting a lot from the 7308 based on the reviews, but it's not even on my top three tubes.
Also, I'm not using the T1 as a HP amp/dac. I'm using it as pure DAC to feed signal to my Yamaha CA-1010 receiver driving a pair of KEF 104/2.
I'm now using a Russian 6N1P on it that I bought for $5 shipped. It is very holographic and warm without losing much detail. Soundstage is wide and airy. For the 7308, I find it to be more "solid-state" sounding. The 6N1P, 6n23P, and Siemens Halske (RCA Printed red) 6DJ8 sounded more warm to me.
What I've learned so far is not to purely base your gear on what you read on the internet. Cheap stuff doesn't mean it cannot make you happy and satisfied. The T1 is a great device for the money, and the tube rolling just made it more appealing to the consumers. If it doesn't sound good to you, sell it, buy a more expensive and better equipment, and move on.
Not everyone will like the T1, but it sure served well for the most people here.