High saturation slide film

[Francis]

For high saturation 35mm slide film (for wildlife stuff) what does anybody 
recommend?
The ones I've been looking at are Fuji Provia, Sensia, or maybe Velvia.
Unfortunately, at the only place within 100 miles of where I live (very far 
from where any one else lives) good slide film costs somewhere in the 
neighborhood of $30 per roll, with developing.
Up till now I've just been using the cheapest print film I could find, my 
philosophy being that if I took four rolls with lousy film instead of one 
roll with good stuff I'd end up with more decent photos. And the with the 
lenses I have you probably couldn't see the deference anyway. But now that 
I'm getting some decent glass (K 200/2.5) I thought that I'd better at least 
look into it.
Thanks,
Francis