I'm modifying my daily driver
The charger or GTO could be fun to.
I've actually contemplated the same thing, and I came to the conclusion that I would probably still mod my celi as well.
I kind of think that you should get the charger though, personally
1.) May prove to be cheaper
2.) Won't have to worry about miles as much
3.) It could be a shit load faster than thte celi ever will be.
4.) You won't have to be as practical about it...