Hi BedHog,
You can see some of my thoughts about the specific construction of the Kodiak in post #4 here.
The Sitka uses the same materials except it eliminates the 1.5 lb convoluted polyfoam layer which may be a little less “risky” construction.
While I understand that these could be very comfortable mattresses … they could also be a little more risky in terms of durability and in terms of value they’re a little on the costly side considering the materials that are in them IMO. I also know though that “value” is more than just the “commodity value” of a mattress and knowing that a mattress matches your needs and preferences (assuming you have tested carefully for both pressure relief, alignment, and your other preferences rather than just testing for “comfort”) and the other benefits and options that are part of the services and options offered by each manufacturer can also be just as important a part of the value of a mattress purchase. Overall I would say that Verlo would be “better than average” but not 'the “best” value available. Of course this is also where each person would need to decide on which parts of their own “personal value equation” are most important to decide on which mattress has the best value for them.
It may also be worth reading post #6 here.
The mattress at mattresses.net uses the same 4 lb memory foam and the same acella-flex base layer but is missing the gel memory foam layer so it would stand to reason that it would be less costly … and also firmer. An online purchase of a mattress can also be a little more risky unless you have the chance to test a similar mattress at Verlo.
Some of the online “value references” I use for memory foam mattresses are listed in post #12 here. I normally dd about 20% to the cost of an online mattress compared to the cost of a similar local mattress to get to “equivalent value” because of the extra risk involved in an online purchase. Of course each person may have a different risk tolerance and may add more or less to reflect their own risk tolerance and their comfort level with an online purchase.
Dreamfoam themselves have indicated and most of the forum feedback has indicated as well that their 13" gel memory foam mattress is a little firmer than the Cloud Luxe and somewhere in between the Cloud Luxe and the Cloud Supreme. It probably wouldn’t be suitable for someone that didn’t want a softer mattress.
Some of the better options I’m aware of in the Madison area are listed in post #5 here and two of them are also members of this site which means that I believe that they are among the best quality/value in the country. the rest of the thread may be well worth reading as well.
Hope this helps 
Phoenix