The low profile is great, obviously if your pulling a shack by hand you might want to go smaller, there’s no way a 11 lber weighs as much as a 20 lol
Well, I look at it this way; (tank weight will vary between different manufactures)
An empty 11-lber weighs 14lbs an empty 20-lber weighs 17 lbs.
A FULL 5-lber weighs 15 lbs.
These weights are all within 3 lbs of each other. Yet for two of these ,,,,,,, It’s ALL dead weight.
If I am going to be humping out 15 lbs of weight, I guess I rather be humping out 5-lbs of LP gas rather than all dead weight.