You may think this strange coming from me, but what does it matter?
I have A4 Fly's, O5 Speed, G7 and 06 Speeds. I use them all.
End of the day, performance isn't that much different between any of them. Ok the 05 Speed was IMO a nicer shape and more pleasing to the eye, the G7 & 06 Speed have taken that a step further with the roto breech handle at the back a nice improvement.
If you can afford it, buy what you want. If you can't, don't buy new and rejoice at the wealth of cheap 2nd hand markers.
Buying a paintball marker is not an investment. Sooner people accept that the better.