Wine with Fish Stew?

[WineViking]

We're having some friends over tonight and my wife is cooking a yummy fish stew. The fish will be of the white, flaky variety, and there will be various vegetables etc. The stew is not of the spicy variety, but there will be a good amount of tomato in it.

I have lots of semi-dry Riesling on hand from some Virginia wineries. I also have some Chardonnay and various reds; mostly cheaper Pinots.

Any thoughts on the best choice? I was thinking Riesling, but I'm wondering if I should go with my sweeter or less sweet Rieslings.

Thanks in advance for any suggestions!