Below are routes for the 2014 and 2013 parade - as you can see, a slight difference, but both go by the Herald Sq. Courtyard. I have also included an Insider thread that discussed properties. I haven't been to the parade, but last year I did happen to meet the CY manager and he said they had several great rooms for viewing (although as I posted last year, they were priced pretty steep - pretty far in advance, they know how to play the game ).
I've been to the float staging area for Tournament of Roses (it was a lot of fun and very interesting) but not the parade, so I don't have any worthwhile info.
But you're doing it right - starting now. Book early, check often, and hope the rate is digestible. Good luck.
Have only been to Macy's Day Parade and it was memorable. Where you stay is key. Stayed at The Essex House and the rooms were tiny, but it was close.
Make sure you have alternative plans and prepare for bad weather!
Get something booked, and then continue to shop till the last minute!