If the wood bar in the middle is bothering you, you can replace the window with a french casement. It opens the same as your casement but does not have the wood bar. A double hung would be difficult to open over a sink, but a slider would probably work. But, if it were me, I would go with the french casement.

For an uninterupted view and easier operation over a sink counter, I have always specified an awning window. An awning doesn't open as far as a casement but a window this wide doesn't need to open very far for good air flow. An awning also looks better from the outside in my opinion since it looks substantially the same open or closed, unlike a casement, and it can be left open in the rain.

I love French casements since they don't have a center post but when the window is closed you are still looking at the jambs where they overlap at the center. I have also had complaints that they are hard to operate and it is sometimes difficult for smaller people to get them to overlap and lock. I have only used Marvin.

Here are two 3-8 high x 4-0 wide Eagle awning windows over a sink. Sorry I don't have a good photo of the inside yet. These look good in part because they have wood frames and aluminum clad sash.

Here are two 3-0 high x 4-9 wide Marvin French casements

Thanks so much! That is very helpful. I really appreciate you taking the time to post those pictures. I think the French casement is a very good idea. I plan to go window shopping later this week! :-)

Nancy

Check out garden windows too while you're at it. I think they're made to fit if you buy from a window co. I hated the middle strip and solved that with a GW with side vents. Better view and lots of room for plants, but I use smaller plants, to let in more light and keep more of the view. Sandy