I agree, the Y-design from Trek is an abortion of full suspension design. It's an experiment gone BAD!
That's me being NICE about it!
You can do much better. What is your budget? A decent full suspension bike that gets decent reviews for around $500 is the Giant Warp. I haven't test ridden one in years, but I've heard they've come a long way. I think I test rode a 2001 model and it was JUNK, but I understand newer models are significantly improved and are "Decent" bikes for the money.
I think Raiyn works at a Giant dealer, you should PM him and ask his opinion.
L8R
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"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger