Good call.
I have spent years and years going back and forth between primes and zooms and in the end came to what should have been a very obvious conclusion and that is I need both. Depending on the circumstances.
In an ideal world, I could do it all with fast zooms but fast zooms (faster than f2.8) are a rarity and come with the penalty of size & weight.
I was debating (yet again) at the end of my most recent season the case for continuing with just primes (needs +1 body) or going back to zooms (needs -1 body) but there are compromises to both scenarios.
Instead, I decided to go with the -1 body, but keep the primes and though it means a couple of extra lenses in my bag, that (and having to do a lens swap every now and again) is my only compromise.
I took a very hard look at the G9II and I think if my needs were different, I might have gone for it (over the OM-1) but in the end decided I wished to stick with full-frame stills but would go back to shooting S35 for video. Which is what I am doing.