Well, you have a couple options here. Professionally speaking, I believe that the home cook needs a couple knives of which being: 6" Prep Knife, Carving Knife, Bread Knife, Paring Knife and if you do a lot of cooking perhaps a chef knife (8" probably).
I wouldn't recommend a full chef knife because most of them are far to unwielding for the average home cook, most prep knives are around six inches in length and they work out well enough.
For a cheap good quality knife look towards Forschner (or Victorinox), great quality knife comes in both a plastic handle (bit better for professional use) or a nicer wood handle. Forschner makes a really great carving knife (I actually use this one in my knife bag, relatively cheap and you really don't use a carving knife as often as other knives).
For what you said specifically looks towards Henckles (sp?), they offer some really nice knives, rather thin blades. I would look to spend probably about 79 dollars on a prep/chef knife, 39-49 on a paring, maybe 79 on a carving knife. And probably about 240 for the 4 knives.
Ceramic knives are cool, I use a ceramic paring knife in my kit. They do stay sharp for a long time, however, you have to send them away to get sharpened.
As far as santokus some people like them, I can't stand them. I find a prep knife much better, particularly when you need to do fine cuts that require precision. But like like most things in life it really is up to the opinion of the user.
And as for where to get them, for a Sur La Table or Williams and Sonoma. (If you have loose morals say you are a culinary student or professional and you get 10 and 15 percent off respectively)