Is there any reason not to dual wield crossbows with the Demon Hunter? I'm level 10 and have a 17 dps and a 16 dps crossbows equipped and with rapid fire I seem to be shredding everything. I do have a couple of 20+ dps 2 handed bows but it doesn't seem like they would be as effective. This is my first Diablo, am I doing it right?
Well, the 20DPS one might be better; I'd try equipping it and see what you get for a Damage listing on the stat screen. Rough guestimate says it should be ever so slightly better overall (like, less than 1 DPS better). You also get to use a Quiver (well, I think?) so there's that.
The thing to keep in mind with dual wielding is that it functions by switching your attacks between the two. You get a pretty good attack speed boost (15%) by dual wielding, yes, but you're still alternating between the two so it's not as big of a damage increase as you'd think.
Also, your skills with no cooldown (say, Rapid Fire, Multishot, etc.) do a lot more damage with slower, harder hitting weapons :x