Okay, so after reading lots of comments here I have decided to go the DIY approach with latex. 

I just dont know what to do for a core and a foundation and where to get everything from.  I am a side/stomach sleeper and generally like the feel of a plush mattresses in stores from the S mattress companies.  I am thinking of going with a firm foundation and then playing with other layers to get the feeling I am looking for.

Anyways, if someone can outline a good approach I would appreciate it.  I looked at overnightmattress.com and like their 7" M-grade core b/c it has free return for 120 days but FBM is much cheaper for the 8" core.  I saw some complaining about the quality of the foam from FBM but others saying they loved it. 

Any advice is appreciated, I feel lost and overwhelmed a bit at this point.

Thanks