First get the whetstones or jigs and learn to sharpen your existing knives. They can achieve new life and sharpness. Then once you have that under your belt and still want a new knife you will be better able to maintain it.
It doesn't matter what knife it is except maybe serrated. They all need sharpening on a somewhat regular basis
Probably a good idea. Should I just get a 1000 grit? Are there any major differences from brand to brand? My local store sells MinoSharp and a few other brands.