In my opinion Boss offers the best value in pedals. You can't go wrong with a Boss pedal no matter what it is... you'll always find a use for it. They're built better than any other pedals out there and they sound better than any pedal out there (arguably).
So, I say either Boss pedal would be a winner. If you want some more info on those Boss pedals check out the thread that I had awhile back called 'Tone Guide': http://www.guitartricks.com/forum/showthread.php?t=19810
Download the .pdf at the bottom that I suggested, it has a tooooon of good stuff about pedals. They're specifically Boss pedals but every pedal follows the same basic principals.