Mattress Forum

First of all, I appreciate this forum! Glad it's here. Been lurking a while.

Over a year ago we got a 100% lemon mattress from Sleepy's (OMG awful! sales manipulation! hypnotism! it was bad). A S&F Garden Grove. It was like a mushball--no support. I have SI joint/low back problems and they were made worse by sinking into the mattress. 

After a year of suffering, we ended up getting a queen 100% talalay latex mattress. The OMI Organicpedic Lago. Support at last! Low back comfort has been restored. The first week was totally comfy, but now we are starting to find that we want just a little bit more cushion on our shoulder and hip points (we are side/back sleepers). Like, the support is a great level, but those points need just a little bit more softness. We are both tall (5'8" and 6'2") and and slender/average weight, with bony shoulders and hips that jut out. 

So we're thinking about a latex topper to add that bit of cushion that we need. I feel confused about the density and height of the topper we should get, since we really don't need much adjustment. Anyone been in this boat?

Also, stupid newbie question: do you get an extra deep mattress pad to accommodate a topper, or does a standard one work okay? Or do you not put a mattress pad over your topper at all?

Thanks!

JB