The kit looks good but rather expensive i would not pay 1/2 that price for that. you can ebay the items youself, and get it all for around 25-35 shipped even to canada.
and for breadboards i like the nano (they have clones on ebay that work great $14) i like ebay by the way, but shipping is slower if u need anything fast.
uno's are expandable(easy shields), and a mega can do about anything a uno can do + some.
my solution for this delema? well, i bought all three nano, uno, mega.
use the nano for about everthing. mega for large, havent touched the uno.