Hmmm....How new are we talking? New to you or new releases?
I'll just give you some bands and albums I think you should hear if you haven't already.
Alot should have some downloadable mp3's at their sites
Beyond the Embrace - Insect Song, Against the Elements
Shadows Fall - War Within, Art of Balance, Of One Blood
Heaven Shall Burn - Antigone
Killswitch Engage - End of the Heartache, Alive or Just Breathing, self titled
All That Remains - This Darkened Heart, Behind Silence and Solitude
God Forbid - Gone Forever
It Dies Today - The Caitiff Choir
Haste the Day - Burning Bridges
Still Remains - Of Love and Lunacy
Avenged Sevenfold - Waken the Fallen
Mudvayne - End of All Things to Come, LD 50, Lost and Found
Nothingface - Skeletons
For some nu-metal/hard rock bands that I think fit in the same group as Disturbed
40 Below Summer - The Mourning After, Invitation to the Dance
Element Eighty - Self Titled
Erase the Grey - 27 Days EP
Flaw - Through the Eyes, Endangered Species
Soil - Scars
Sevendust - Animosity
Spineshank - Self Destructive Pattern
Stone Sour - Self Titled
Ill Nino - Confession
And maybe you should check out some of the melodic death bands (not sure if you're into that or not)
Dark Tranquillity - Character, Damage Done, Gallery, Mind's I
Callenish Circle - My Passion_Your Pain, Flesh_Power_Dominions
Arch Enemy - Anthems of Rebellion
Soilwork - Natural Born Chaos, Predator's Portrait (They have both older and newer albums, but I think these 2 are a good starting point)
In Flames - Whoracle, Jester Race, Clayman (avoid Reroute to Remain and probably Soundtrack to Your Escape until you hear these)
Kalmah - Swampsong
And for some "hydrid" metal:
Into Eternity - Buried in Oblivion (progressive death metal)
Mercenary - 11 Dreams
Orphaned Land - Mabool
Amorphis - Elegy (once a melo-death band, now more folk-rock, this album is, IMO, the perfect blend of both styles; newer albums aren't very good)
Some other bands that have some good tunes but I don't know that I'd recommend whole albums.
Machine Head
Childrenof Bodom
Cannae
Demon Hunter
Diecast
Nightrage
You may have heard several of these already, but this is a pretty good representation of most of my collection, minus some of the power metal and progressive metal/rock I have, as well as the albums that aren't worth mentioning.