Not sure about the trade as I don't know how much that model of PPQ is worth, but I can add my 2 cents on the G-20 (mine anyway):
Totally flawless thus far. I have an early gen so the grip on the thing is huge, by I have large hands so I enjoy it. I know the new ones have slimmer grip profiles which are also comfortable. I also really like the 10mm round, but as said before, can get very expensive to shoot unless you reload. I would get one if the timing/money was right. I also slapped on some decal grips. Looks nice, shoots great, and is a fun pistol.
"Vegetarian, an old Indian word for bad hunter."