No, I'm saying that the amount of money I would save with going with Rebel XT instead of 20D wouldn't be enough for buying better lenses than Sigma.
There is nothing wrong with XT's resolution/sensor/DIGIC II. But when you compare it with Nikon D70, for me, the only thing XT is better than D70 is resolution. And D70 lacks some features I would utilize (at least I think I would).
Anyway, I don't expect to be buying any SLR in 4-5 year's time, so I want better camera than Rebel XT and D70 .. and that is 20D.