Institutes of the Christian Religion - Which one should I read?

I purchased the Calvin 500 Collection last year which contains 3 different translations.  I also already had this one

http://www.logos.com/ebooks/details/cicr  which I think is the translation by Beveridge, but I'm not sure.

I'll probably only read one, but I'm not sure which one it should be.  Any ideas?

Thanks,

Ron