Get the Peco hammer, but then go up the Rathalos line. (assuming high rank) It'll have more raw, more blue sharpness, and more fire than the gun hammer at similar rank, and the Peco hammer doesn't even have a high rank version, skipping straight from low/early high rank power to G.
I can't even remember what those armors give but IIRC Pink is probably slightly better, so out of just those two, Pink.
No. Do it.
Move in with R attacks (not the spin though). The full X-X-X does more damage than a super pound (the one after holding R for 2 flashes where you do a tiny side hit and then a smash down) so do XXX-R-XXX-R-repeat when things aren't moving.
The head is usually the weakest spot but also the most dangerous. Just because you have a hammer and can do fancy KO stuff doesn't mean that you're only allowed to hit their faces. Go for the feet or wherever you like.
I bought this game on the 3DS hoping to play with people.
Afterwards I learned that the 3DS version doesn't support online play because herpa derp lol screw you.
Then I hear Monster Hunter 4 Ultimate will have online multiplayer on the 3ds, so hooray.
Then I learn that there's a new version of the 3DS coming out that's going to have much better framerates than the one I just bought can handle.
*Sigh*
This is the first Monster Hunter game I've ever played, and I've enjoyed it quite a bit so far. I just completed the Zinogre urgent quest for the village, so I'm getting close to the end of high rank village quests I think.
Fear not. Maybe you can just sell/trade the old one? It certainly won't be essential, and I hear that 4/4G have much better FPS than 3U does even with 3D draining away processing power.