i guess maybe for the money 3.0x2 might be better than a 5.0
isnt the physical size of the 3.0 the same as the 5.0?
for me it makes sense to have 5.0x2 for a couple more bucks. same size, maybe slightly heavier. also 2.0 instead of same sized 1.5
my set includes 2.0x2, 5.0x2 and 9.0x2