Thanks Lance, I want something that is OK in low light as I need something for conference filming where the light isn't great & I can't use a camera mounted light.I thought the XA20 might have the edge there but I do like the manual settings & layout of the AC90, especially as I already own the HVX200. I do like the slowmotion of the XA20 though & think I would use that a fair bit.
i was in the same boat as you a few months ago.
though i film football and needed to add 3 cameras along with my sony ex-1.
i went for the ac-90 and couldn't be happier.
forget the slow motion feature and do it in post.
i did film a wedding in june along with my ex-1 and i liked the ac-90 indoors.
reception the dj went stupid with the low lights so i went and got the ac-90 out of the car and got footage that i expected to be full of noise.turned out great.
on saturday i filmed some football and at halftime decided to go auto iris,auto focus different shutter speeds of 1/60 and 1/120 and all shots looked great.was a day with breaking clouds and alot of light shift.camera has a great seamless shift with conditions.
the biggest shift you will find in picture quality is if you don't use a nd filter outside.
while our needs are different,i would be very surprised if this camera didn't suit your needs.
you will be fine with either camera.