Get the all-trac. Seventh generation is awesome and all, but the fact is that it has a less serious look to and has a bit too much of a plastic feel too it (that's just my opinion). Besides, it seems to me that would should be able to do more performance-wise with the all-trac. Mind you my opinion on that last bit is something you should take with a grain of salt (my knowledge of such things is limited).
And 7th generation celicas are definitely very girly. I'm a girl, so I can say it with authority.
Besides, 5th gen celicas have pop-up headlights. There is nothing better than pop-up headlights. Nothing. (course there is wind resistance to be considered there but fun toy>a bit of wind
)