If you looking for stuff on a budget, look at the classified section here. It's better to get good used stuff rather than new crap stuff.
44/17 is right though, just use the cranks you have! Biopace rings will work, mate had them on his ss hack so really you just need new chainrings bolts. http://sheldonbrown.com/biopace.html. Sheldon talks about how they are suitable here, the tension difference isn't too bad.
If you looking for stuff on a budget, look at the classified section here. It's better to get good used stuff rather than new crap stuff.
44/17 is right though, just use the cranks you have! Biopace rings will work, mate had them on his ss hack so really you just need new chainrings bolts. http://sheldonbrown.com/biopace.html. Sheldon talks about how they are suitable here, the tension difference isn't too bad.