>>2692644not doin any birdwatchin/superbowlin photography this year, the 1D MKIII/1Ds MKII are just old compared to the cameras released today. they've got old digic II and digic III sensors, the iso maxes out at 3200, the lcd screens aren't as nice as the T2i, 1Ds doesn't have live view etc. it'd be disappointing to replace my entry level T2i with a pro grade 1D and have noisier photos for a camera that is only a couple of years older than the T2i.
I've got a 28mm 1.4, 50mm 1.4 and a 85mm 1.8, don't have a budget in mind but know I could find those older 1D's for < $700.
don't need the 1D's for anything specific like fast shutter speed/autofocus but just as a general upgrade from my T2i. having a aps-h/full frame is an upgrade to me and megapixels aren't that big of a deal