2ds. Cheaper, and the only thing you don't get is the crappy 3d nobody uses. Plus they're harder to break.
Not a chance, new 3DS has the 3d feature that stops it being crappy, has the c stick and is generally better for Monster Hunter
I have the 3ds and I am fine with the size of the machine. It actually a perfect size in my opinion. So its probably not worth getting the bigger one. Also at least for me I never use the 3d function although I would still not recommend a 2ds. If you need info, don't be shy. I hope this helps.
clam shell design was made to make sure it doesnt break nearly as easily as it was required to have it drop at 6ft high 5 times in a row and survive. Hence. The clam shell. Either one works, depends on the size of your pockets. Measure pocket size and compare it. Otherwise unless you put it in a bag or something i would recommend the normal.
If you already have a 3DS, stick with that you'll be fine, if you have a regular one, it's not worth the $$$ to buy the New one by my speculation, if you don't have one, I'd go with the XL (New), just be sure to buy a charger and a size 0 screwdriver.
N3DS has better hardware than 3DS i have 2 N3DS for a year(cus 1st one was stolen by my sister, Bitch Tornado) It has louder volume than 3DS