Real time intruder system using VEEK / tPad

i would like to ask that what are the differences between video & embedded evaluation kit(veek) and tpad multimedia development kit ? :)

as i go through the specification, so far i only get to know that the only difference is veek has an additional function, which an accelerometer being equipped.

to build a real time intruder detection system, which altera board would be recommended other than these two?

p/s: i also came across the altera de2-70 digital camera development platform, which is cheaper but is out of stock for now.:cry:

Anyway, I hope to hear some of your opinion and suggestion and thanks for helping me :)