Help me! Which head unit?

[Obbzi]

I have been shopping about and finally bought a new head unit. Well, actually I have bought 2 by mistake, D'oh!

I have bought a Pioneer Avic F900BT and a Pioneer Avic HD1-BT butt which one do I fit in my Golf?

I wanted an all in one unit, sat nav, bluetooth, touch screen etc and couldn't decide which to go for , anyway I have neded up with 1 each of these, ha!

Your thoughts would be appreciated

[troublestarter]

i have supplied and fitted several of the f900bt units and it is a great piece of kit
nice and simple to use aswell
the only difference between the two is the d3-bt is a hard drive system