Hey Chevvy,
No worries. There is so much out there that it's SO overhwhelming!
Doll kits, or reborning kits, are basically babies or more recently toddlers. They are a "naked" head and limbs and sometimes include the body, but not the weighting inside the body. People do reborn manufactured dolls, though, like Masterpiece Dolls, Ashton Drake dolls, etc. I'm not sure how exactly, but the dolls are stripped and reborned. Cora-lee is a Masterpiece collection.
Skille dolls are created by a doll artist named Sissel Skille. These would fall under the category of "Artist Dolls". There are two types: vinyl and OOAK. The vinyl dolls are not so expensive unless you are looking for a very popular doll named Simone which can sell very high depending on the condition, market, buyer and seller. The other dolls are perhaps a few hundred which is less expensive than the more rare OOAK's which sell for about $10,000. (OOAK = one of a kind) You can see Pat's and Janet's Skille dolls on this forum in the Vinyl and Vinyl-Silicone section here on the forum. I also posted a link to an American doll shop called The Dollery in the general chit chat section. I believe they are cernit. To be honest, I don't collect these dolls but they are very popular. Other artist dolls include Annette Himstedt dolls, Zwergnase dolls, etc. Romie Strydom used to design artist dolls but now designs kits. I have one of her earlier porcelains (my avatar) and LOVE her work.
I have been watching the Strydom kits to see the "one" pop up. Nita is "it" for me! I have admired a silicone doll by Michelle Fagan for awhile and have been looking for that open-mouthed sleeper to reborn. Here is the Fagan silicone:
http://www.michellefagan.com/Maysilicone.htm It's a beautiful doll but I don't want to get into silicones. As far as baby dolls go, I like the reborns at the moment. It could change over time, but I really love the freedom with reborns - I can design my own baby doll! I can select the sculpt, the style of the painting, the rooting and everything. That's very appealing for me.