really comes down to how much weight you have on the bike. Thats the real kicker, in conjunction with what sort of hills you are tackling.
We can all give our opinions not knowing these factors, but it makes sense to throw on the 11-28 and see how it goes.
I've done a lot of loaded touring, hence my lean to lower gearing.

even lightly loaded or not loaded at all, we probably all spend a vast majority of time in the middle gear inch range, and appreciate a lower range a lot if we have gear on the bike (or more gear than he is suggesting) on a steep, steep long hill. Compared to the relatively few times we miss higher gear inches, appreciating lower gear inches is much more common, and will make a bike more versatile if you want to put more stuff on it.

but, hey Peek, start with the 11-28 and figure out what is good for you and/or is worth spending "x" $s for "x" chainrings.