For the past few years, me and my wife have been sleeping on the extra firm Queen JC Penny base and 3" Sensus Foam topper. We have liked this combination (it might have been a tad too soft) until recently, when the base and Sensus topper both seemed to have lost the support they had when new. We want to upgrade to a King bed anyways, so this a a perfect time to build a new bed.

I have been reading a lot of posts on this forum, and here is my current planned setup (which seems to change daily as I read more)

1. King 4" FBM Lux High Quality Foam Base layer

2. King 3" FBM HD High Quality Foam Middle Layer

3. King 2" Sensus topper from overstock.com Comfort Layer

4. King 1" FBM Medium - Talalay Latex Comfort Layer

I was originally going to go with just 3 inches of the Sensus on top, but I am thinking that the memory foam + latex combo would give me more flexibility. I am looking to build a medium-firm bed that is closer to the medium then firm side. I plan on putting this on an Ikea King bed frame with slats.

Has anyone used a combo of memory foam + latex? I am thinking that I could switch them around to get the feel that we like best. Would 1 inch of Latex be enough for this, or should I go with 2? Also, do I need the 4 inches of LUX on the bottom, or will 3 be enough? Since this will sit on slats, I was thiking the extra inches would add to the support.

Thanks a lot for your help!