Thanks. I was thinking of gettng it. I guess the quality would depend on the brand?
the new ones, which handle digital signal should be better, but i m not sure how much better, are going to be

If you think you will use a TV tuner for its main purpose, then go ahead and make the investment, you will be able to play PS2 games using its line in function.
But it doesnt worth the risk of buying it just for the PS2, unless you can somehow test it...
