What to do - Above floor Tank or Below floor tank ???

[fatwgn]

Currently rebuilding a 64 Tradewind and am putting a new floor in -- but I cant decide what to use -- above floor or below floor tank ---- anyone with a above floor tank could you tell me how tall your toilet is off the floor - Measure floor to Seat -- and does it feel ok when your going (you know does it feel to high??? --- The tradewind has a below floor tank in it that I have not checked to see if it is any good yet.. but would like to upgrade anyway -- It exits between the body and bumper --But I am not happy with the rear set up on the tradewind ((It looks very prone to water leaking in the rear of the trailer between the bumper and body - there is a storage space there - so I was thinking about sealing that area off and exiting the black tank elsewhere - above floor tank seems easy (build box - mount toilet) then it is easly accessible -- below floor tank would require belly pan removal to access tank ??? With any luck I would never have to access the tank again BUT I would rather build for the future --- Thank you for any suggestions
Scott