The Bends by Radiohead is an absolute must.
I'm not sure how indie these are, but you seemingly like similar music to me (I, too, made the classic rock to indie transition), and the following are awesome:
Hot Hot Heat- Elevator
Snow Patrol- Final Straw, Eyes Open
I'm also a huge fan of Beck's latest CD, "Guero"
Also, here are some more emo indie things that I listen to
Jack's Mannequin's myspace
Something Corporate's myspace