Ok, so here's my situation:

Fg to spend: ~ 2.5k, can get more if one really shines above another at higher prices

Pure strength or 120 dex?

Axe barb btw

this is entirely up to you

strength will boost your average damage (strength increases your base damage, boosting the overall damage)
dexterity - boosts the damage of your crits, and how often you crit , this also reduces the damage and often of enemies crits

imo, you should go for a bit of both
i think this will end better

BUT
i do know a few guys that do pure strength builds and have alot of success aswell

mix and match

i would go 120 dex^^

i like pure dex

Possibly just mix it slightly, not as much as some reccomend at 120

and keep str a good deal higher..Lets say 90 dex? Should still give a fair bit of crits while strength keeps your damage very high consistently.

High base damage + the ability to crit = Really high crits..but not often.

But since your going mostly strength and depending on consistent damage anyway..doesn't really matter its just helpful.

120 dex

with that amount of fg and axes, i'd go for about 100dex

rest into str

Axe barb = 75 vit rest str EE armor str charm highest ee weaps as possible

I had str build last climb, it sucked (at least if you dont put lot's of fg to items). Besides not hitting criticals, the monster's crit will hit hard with low dex.