Does size matter? (Not what you think ...)

I posted this to the Yahoo GTD/Analog group, so apologies if it seems familiar. I'm really interested in the Levenger Circa line, and am seriously considering their Agenda. Question is: letter size or junior size? I like the portability of the junior, but the letter would allow me to print, punch, and insert stuff (e-mails, Web articles, memos, etc.) without having to trim paper. What do you folks think? Anyone in the same boat with advice to share?

Thanks!

--Tom