Well I'm going to play some devil's advocate here, just to get things going a little bit.
While the handguns do pack a punch, they seem to lack any sort of range (only 24'') and crossbows are the same strength but with a 30'' range. While neither can move and shoot, the handguns seem like you may only get a turn or two of shooting off while you gain at least 1 more turn of shooting with the crossbows. Not to mention the fact that you can start firing crossbows from turn 1.
(I think handgunners win it I just want to give some debate to the subject)
The Outriders to me just don't seem very worth it. While they can be very effective I find that the fact that they need to stand still in order to fire their shots makes them a very vulnerable unit. With a weak armor save a quick round of shooting can send these men packing quite quickly.
When I compare them to the cheaper pistoliers I see many advantages. First the move and shoot ability makes them a good unit considering that fast calvary can march and fire. By using pistols they are uneffected by long range or by moving, making them even more interesting. Finally, noting the fact that with a brace of pistols your outriders can charge into a combat with 2 Str 4 attacks each with a -2 to armor makes them a very nasty infantry/calvary killer, especially on a flank when they can minimize the number of attacks back. The biggest issue in using them correctly is to make sure that your calvary are in the right position and not being shot to pieces.