My minor input:
5/8 to 6/8 seems to be a good size. Bigger than that, you will have trouble getting around your nose to do your moustache unless you really know what you're doing. Remember, with a 5/8 blade, you can use a pretty acute angle (i.e. the spine of the razor closer to your face), and so will be less likely to cut yourself. With a big fat blade, you have to approach certain spots (like the aforementioned upper lip) nearly perpindicular, and if you don't know what you're doing, you'll slice yourself.
Full hollow is easiest to start with. Wedge grinds look cool, but they take a bit more skill because they give your face less feedback
Spike points look much better than round points, in my experience, but unless you have a beard you are trimming, they aren't of much use. In fact, the sharp point gets in your way and makes it very hard to shave your neck or other places where your face has peaks and valleys. Also, if you aren't careful while doing an upward pass of your neck under your ear, you will slice your ear. A round point won't do that.
Can't help much on the stainless vs. carbon argument, but I will say that if you get carbon steel razors, you must invest in some dovo sterol oil to apply to the blade hinge when you're done shaving, otherwise, no matter how hard you try to dry it off, it will rust and stain. YMMV, but this used to drive me crazy until I started oiling my blades.
[SIZE="2"][COLOR="Navy"][SIZE="1"]If you teach a poor young man to shave himself, and keep his razor in order, you may contribute more to the happiness of his life than in giving him a thousand guineas. This sum may be soon spent, the regret only remaining of having foolishly consumed it; but in the other case, he escapes the frequent vexation of waiting for barbers, and of their sometimes dirty fingers, offensive breaths, and dull razors.
[B] - Benjamin Franklin, 1706 - 1790[/SIZE][/COLOR][/B][/SIZE]