hi
i play with ping zings and have played pings over 25 years now and i don't notice the offset at all now. i had k1s and eye2 and you soon get use to it. i also think its easy to shape the shots you want with pings too, lot of pro's use G2 and G5 and seem to shape the shots ok, the G5 do have a lot more sole and do make the ball fly higher without any effort.
i do think the G5 is a bit more forgiving too, but both are good clubs, go to a ping shop and try both out and get set up at same time for what colour clubs you need and what grip and what shaft, they all make a diffrence to the way you play with the clubs, what ever ones you get you will know you have the best if fitted too and cant blame the clubs on a bad shot only your swing.
best of luck
bil