Hi ivanrajkovic,
I just talked with Joe (who was still on his honeymoon and was actually on the golf course when I called :)) and he confirmed that the Alexander Select has 2" of 4 lb gel memory foam over 2" of 4 lb memory foam over a 2 lb polyfoam support core so it uses good quality materials and there are no lower quality materials or weak links in the mattress.
As you mentioned it’s brand new on the floor so some of the salespeople may not be familiar with it yet. It may be similar in terms of firmness to one of the three firmness choices for their “Love Bed” but it would have a completely different feel because the comfort layers are memory foam rather than latex (which is a much more resilient material). Both would make good quality/value choices but there is more about the differences between memory foam and latex in post #2 here.
Phoenix