so i hit 60. . .Follow

[********************************** I really don't know what to wear. I usually just stick with whatever one has the better stats. Is this wise?[/quote]You're a BM hunter, so you really shouldn't be getting hit all that much.
That being said, there's not that many things that can hurt you that much when your armor is leather compared to mail (especially if it's a few pieces).
Leather is fine to use if it gives you better stats.
*************************** Weapon. I'm a Dwarf, so I've been using a Gun, but the one I have been using is outdated (if i remember right, it is lvl 43 -.-). Should I still stick with Guns? Or maybe look into Xbows/Bows?[/quote]I find it silly when hunters try to stick to 1 type of ranged weapon.
You should try and level all three so that you can safely use a different type if it's an upgrade to your current one (Only problem is changing ammo bag/quiver and ammunition type)
************************ dual wield or not? I DWed up until a few quest ago where I went back to a Great Axe (the weapon I used before I was able to DW). Does it really matter If you use one weapon, or DW? Why do so many hunter's use Spears?[/quote]Spears are generally made now with hunters in mind (They give the best stats for hunters).
When it comes to DW vs 2H, choose which ever will give you the best stats, you're not using them to attack.

You will change equipment every day as you quest/level. Doesn't matter. Use the highest DPS ranged weapon (which should be a crossbow for a hellfire quest for you right about now) your level allows. Read the stickies above alot. Study them as you near 70, start to look at the gear you would like to get that can come before 70 and try to group to those instances. Go farm honor in BG and save it for 70.