The moog sound is admired and for good reason but personally I think one needs a mixture of tones so something like a Prophet08 or Andromeda adds to the mix nicely.
I always prefer a bigger sound palette, it just allows me to keep things different sound wise. Also helps with my inspiration when creating.
Regarding the Prophet 08 - imho this synth has everything i expected in the sound department. It has a rich clean sound, just like the Omega 8. Obviously sounds different due to filter design, etc. But it definately sounds analog to my ears. It's not as wet sounding as a Moog (inc my LP), but it sounds much bigger in terms of the stereo spread than my A6. It compliments the A6 pretty well imo.
From web demos, it is quite obvious that the P'08 can sound sharp and animated, but also fat and warm. Various string demos really show off the sound depth of this synth. Some sci fi pads, as well as big basses. Suprised to hear such smooth leads too. I am pretty much sold.