My picks would have to be:
The Ring--Well done movie. Cool to watch on Halloween.
Dawn of the Dead--As it was said before, more less, awesome as an action flick, cool as a horror movie
Joy Ride---Kick ass! Need i say more
The Others--Creepy as hell.
Final Destination 2----Awesome death scenes, Fulci would be proud (wipes tear from eye)
The Gift---Brought to us from the greatest director of all time, in my opinion, Sam Raimi
Texas Chainsaw Massacre----A hell of a lot better than we all thought
Wrong Turn-----Cool, fun flick
House on Haunted Hill---Cool movie with awesome slick visuals
Hellboy---Horror or not, it was cool Del Toro's the man
Blade 2----Thank you, Mr. Del Toro for such an awesome movie
Jason X---Funny in a stupid and sad sorta way
Resident Evil----In my opinion Anderson's only good movie. AVP sucked anus
Identity---Any movie with the last letters in the title being t-i-t-y is good. (okay that was lame

) Cool movie good twists
Jeepers Creepers---Cool movie kinda reminded me of the movies of the seventies. That was before everybody was claiming their movie was a seventies throwback
Now, I liked these but the movies I truly love are Indie horror movies. These movies were cool and good, but movies that I consider modern classics are mostly Independent horror movies. Also, a lot of the movies you guys are mentioning I would consider Indie movies like May Cabin Fever and House of 1000 Corpses