in low end models you get what you pay for, they will the same or similar functions, like hulu, net flicks and so forth..
from what i've seen with the bdp 370 I would say 280 is going to be pretty multiregion out of the box assuming the dvd or bd disc has some form of region lock imposed on it
I would also consider toshiba bd player, bd has a key code switch to select what region you wish to play. dvd end select region play can also be though there is a multi region select option, as of yet there is no multi region select tab for bd section , though how many times you can select a, b or c before it becomes a perma lock situation is also unknown....
my opinion unless you're going to brand much what you own, I douby you will get the best optimization out of your setup,,
having an a mix of vendors can cause a mix of pains..