are these specs enough for a MBP?

Starting a pretty heavy job and I am ready to upgrade my equipment (the existing)
Editing :90 promos.
4 hours of footage
1080i

99% of my work is promos and trailers so I work off full rez movies. No need for crazy rendering, color correction, playing real time for gfx.

Here's what I have:

17" MBP
2.66Ghz
Intel Core2 Duo
Memory 4Gb 1067Mhz DDR3

Any suggestions?