Mattress Forum

After far more research and confusion than I expected, I've settled on a latex mattress. Research, research, research and reading forums like this one have answered most of my questions, but I would appreciate some feedback on a few remaining points. I have settled on a 10000 model (10 inch, three 3-inch layer) from SleepEZ. I know that they can answer many questions and help me choose the right density foam, but I'd like to get as much advance info as I can.

I presently weigh about 270 and am aiming for 245 by summer and eventually somewhere under 230 - doable and necessary as I've hit the age where I can't afford to carry my former training weight plus *ahem* some pot roast dividends. What foam densities should I look at for my side? Will I sink right through a Soft top layer (22-24 ILD)? What densities should I look at for the middle and bottom - am I likely to be happier with Med-Firm-XFirm rather than Soft-Med-Firm? If we get a Soft top layer, does it compress too much if I swap it down, say Med-Firm-Soft? Ditto all questions for my wife's side - she weighs about 165.

I do plan to get 100% natural talalay; the arguments in favor of it outweigh the cost issues for me. I am confused, though, because SleepEZ only offers Soft and Medium slabs of this material on their component page - so is their pricey "100% natural talalay" still that if you order Firm and XFirm slabs?

Finally, I am leaning strongly towards an adjustable Euro-slat foundation. I know that a solid slat foundation is just fine for many folks and might possibly meet all my needs... but if I'm going to spend this much on a bed that promises great durability, that last stage of adjustability might matter over the next 10-12 years. From what I've read, most people use a thinner (7-8 inch) mattress with a euro-slat foundation, but with my weight I think the 3-slab 10-incher is a better choice... so how will it interact with the adjustable foundation? Should I go up a step in firmness, maybe Soft-Firm-Xfirm, to compensate for the give of the foundation?

Many questions, I know - TIA for thoughtful answers.