I think my tranny has finally had it. wont seem to go into third at all, also creeps hard at a stop sometimes. what are my best options to replace my 700r4? should i have it rebuilt or buy a prebuilt? where should i buy it from and should i install it myself or have it installed? any estimates on prices and time on this?

Your best option is to replace it with a good 700R4! Of course, you already knew that!

There are guys here on this site who rebuild and sell transmissions. I would advertise in the parts wanted section!

Good luck!