Skin wise it´s a bit hard to give a certain advice since it´s not really clear what you are looking for or if you intend to keep your system head or not. Especially if you consider not buying a mesh head it limits your options, since a lot of designers stopped including system layers. And since mesh heads are another serious investment you really should demo them first until you find one you´re really comfortable with. In my experience there are not many omega compatible head skins in the male market, so going with everything besides a catwa head will probably limit your options again too (at least I head trouble finding another skin for my head, others may have made different experiences).
Skin makers out of the head and in a random order that come to my mind: 7DeadlySkins (may even sell system skins), Birth, ClefdePeau, Sessions, Vendetta, notfound, StrayDog,TableauVivant. And i probably forgot a few.
Hair makers: Dura, Steahltic, Modulus, Volthair, Doux, Aggrace, Nomatch, Deadwool (has only one but the slicked back hair is looking rather nice)