I would buy what you like the best. However, I noticed you indicated you did not want to tow a dingy. Unless you plan to get a small motorhome, 26' or less, you really need a tow car.
Lots more 5th wheels sell to full timers than motorhomes. I suspect because they are cheaper. I much prefer driving a class A DP to a truck. I really like driving our rig. Plus motorhomes are set up to dry camp easily. 5th wheels normally do not have generators and the systems to dry camp.
Test drive a few and then decide.