Following on from the above, I bought a Tron Seven phono (and a Tron Seven pre as well, but that's another story) about 2 yrs ago. I had been using various phono stages, from the usual suspects, Audio Research, Nagra, etc - in the UK the Tron Seven phono in full-on "GT" guise costs £10k GBP, so it is a big investment. I would add, that a lot of posters on here seem to be dealers, distributors and the like - so I take their "reviews" with a pinch of salt. However, I am a private individual, and I actually bought the Tron Seven GT with my own, hard earned cash.
When you buy a Tron product you get to deal with the main man, Graham Tricker, hence the TOTL model carrying the GT tag. You get to speak to the designer, the product builder, tester, dealer, etc - as it is all the same bloke! The quality of components used in this is excellent and the internal build quality is an OCD-fetishists dream. Don't be fooled by the simple black casework; the magic happens inside.
Suffice to say, this is the best thing I ever bought, and whilst other bits of my system change, the T7GT remains. Why? Sound quality. It allows music to breathe, flow and pour out. Never mechanical or artificial, the sound is an emotional experience. The level of detail is better than anything I have had too, but it is the timbre, the sheer musicality that makes it better than anything I have heard or owned before.
I guess you buy based on a number of factors. Sound quality, build quality, value for money. I put my money where my mouth is.