Some things I've found out:
Mark VII rear disks are bigger than the T-birds, but the 1.25" longer axles are too long for the same backspacing (T-birds/SN95 are only .75" longer than stock... I think the SN95 disks are better though).
SN95's only have 11" disks up front, but you can upgrade to as much as 13". Even so, they provide 20% more braking surface, and the dual piston calipers should be better.
So, I think I'll go with a total SN95 brake setup.
As for the wheels though, the 17" Pony R's
http://www.ponyr.com really peak my interest... the 99 cobra's would certainly be more budget oriented though.