I've been riding DH for a few years, Norco makes a decent bike. All my race buddies run high end brands like Santa Cruz, Kona, etc. - but they're sponsored and practically get the bikes for free.
If you ever want to ride some fairly level trails or XC stuff, go with a FR. I'm bad about only taking the lift up, crankin my Haro up a hill blows usually.
1988 Toyota Xtra Cab, Four Linked, 22RE, 40's at the moment.