I would advise against a stainless chopper. If I had to pick one, I'd go for the now 'unavailable' Blackjack Marauder MK2 which was fashioned in Japan by Blackjack knives some years previous. That knife sported a 15 inch, stainless kukri style blade. I doubt if you could even locate one these days, but they were superb choppers. I suspect they are also sky high IF you could even find one!
A cheaper route might be to get the Meyerco (Blackie Collins) Machete/Axe, which has a 12.5 inch stainless blade with a full tang construction. The one I have is a decent cutter/chopper but is not in the same ballpark as a high-carbon machete by any stroke of the imagination. The Meyerco is a stout blade and could be used in the survival/machete role with some success although this Chinese made knife has a 'mystery' tempering process surrounding it according to many who have used it: some keep a great edge and exhibit little deformation/chipping, others don't fare so well. You take your chances with this one, but it leaves some green in your pocketbook!
CS laminate products offer good corrosion protection. One of their upper level kukri designs might also be a viable option for you if you lean towards the San Mai crowd.