Do you expect to be doing a lot of close focus/macro photography? If so, a meter prism is quite handy.

If you like to use a camera with one lens and a minimum of other accessories, then a meter prism is handy.

Otherwise, a hand meter works great.

And if you'd like to consider a Mamiya 645 Super with a couple of lenses:

http://www.apug.org/forums/forum379/...nses-grip.html