Saddlebags or Panniers for an m696? ('08)

I have searched for existing posts, but didn't see any that solved what I'm after... BUT, if I've missed an old thread... sorry!

I'm looking for saddlebags that'd fit a 15" macbook pro in (ideally without chopping my macbook half to put half in each side!).

I did of course consider backpacks, but I'm trying to avoid anything on my back if poss, rather have the weight over the back wheel.

Also:

- I'll don't very often carry a pillion, am okay with something that removes pillion options in a non-permanent way (couple of bolts etc is fine)

- I mention panniers, but I don't actually mind a top-box/bag, but prefer nothing that stands too tall

- Current wxhausts on the bike are stock

What do people think? Anyone use panniers to fit a similar size laptop in?

Cheers!