5 Speed Gear ratio advice?

Hey the title of the post is
5 Speed Gear ratio advice?

If newbe-OP is gonna spring a wad of cash, he deserves to know why.

Besides, you knew I'd be coming around sooner or later,lol; right?
The 'wad of cash' is not lost on me. I've been wanting to do this swap for quite some time. I very much appreciate the advice.