The Palladium Mattress in a Box is available at Freedom. It has a foamy, supportive feel but is it good enough to compete with the big players?
Bedgear M1 Mattress (Discontinued)
The Bedgear M1 Mattress is not as comfortable as the M1X and feels quite a bit firmer. It feels quite dense but offers good spinal support.
Bedgear M1X Mattress (Discontinued)
The Bedgear M1X Mattress feels fairly dense but offers good spinal support and a nice level of comfort as well. Partner disturbance is very minimal.