the PC13U/SB13U can be moved (up the stairs) easily by two people (even if one of them is the lady) just make sure you carry the woofer side.
the PB13U requires two manly men
don't even try moving it up the stairs yourself.
within the room, i use the 'rug under the sub' trick.
-0-
you guys have free trial over there, get all 3, return the rest

(wait, is that ontario Canada or California?)
(or like me, one each of sealed and ported - because they really do sound different)
a PC13 on top of an SB13 would have a tiny footprint for the woofage you get.