had both,
the str hybrid is the best overall character for me in the game on the chinese side
(i had a 5:1 hybrid with 100 bow\fire 70 light 30 ice and prot.... it was awesome)
the 80:80 is more of a party player unless you take ice at least 60, then you will do pretty well in everything as well.
having played a 5:1,70:70 and 1:5... i would say all are about equal.
5:1 excells in pvp and can tank while grinding in parties,
at least +3 garm/prot needed and +5 weapon for good damage and enough protection
70:70 is a good damage dealer that can survive enough to be good at pvp and pve
around +4 on the set and weapon is good for adequate protection
(1:5 is like a turret throwing around death
+4/5 equip would be enough, a +5 bow suffices to kill almost anything your lvl)
with all the crit attacks and good attack % multipliers, the str hyb. would be a good option.