If you are considering the fa07...
You must also consider a used jupiter 80, which has many many more of the super natural sounds and options(even livesets comparable to the yamaha ensemble voices)
Has a structure perfect for performing live..
It only misses the pcm samples which are huge on the fa series and espescially the integra..

The fa series super natural acoustic sounds tend to miss precisely those sounds interesting to arranger players...
There is piano, dp, organ strings and guitars... but no SN Brass, winds percussion Saxes.

For a keyboardist, the FA series is an incredible instrument, where the jupiter 80 still is a dream come true for many...