I ordered samples from a few different places online. It was worth it to be sure what I wanted before ordering a whole bunch (with more shipping charges). Unfortunately I couldn't figure out any alternative to trying them out in my hand, and none of the big-box stores near me had the styles I really wanted to try. I used topknobs.com and their samples are not free -- they charge $5 each for shipping -- but they do provide a credit toward a bigger order.

Thanks everyone for your replies. I did as you suggested, gooster, and taped them to the cabinets. Surprisingly, they looked MUCH different on the cabinets than they do sitting on a counter top. I did not even notice that the tops had a convex curve to them ... I thought they were straight! And unfortunately, the light reflecting off them really accentuates the curve and it is not quite the look I was going for. So, it is back to the drawing board for me. For anyone else going through the knob/pull selection process, actually putting them up on the cabinet is extremely helpful. Even when my DH held them up to the cabinets, I did not notice that the top edge was curved outwards. Yes, they are still lovely pulls, just not the pulls for me. Sigh.

The one in the master bath is called a single or double-hung window. If you can slide the top down too, it's a double. I have both side to side sliders and double-hungs in the kitchen. I can advise against double-hung - they are fairly difficult to operate (leaning over the counter to operate the catch in the center), although its nice to be able to have some air moving near the ceiling. Windows come in standard sizes for a given manufacturer, but all manufacturers do not offer the same sizes. You can get custom made windows, but they are really expensive. You can get single casements in 36" wide and about your desired length, in the standard sizes from some makes. Whether they match will will depend mostly on adding grids between the glass panes in the same pattern as your existing windows. It will also depend on how picky you are about it. Casement windows will likely have a slightly different appearance around the edges on both the in and outside. Other details might be a little different from different makers. The new windows are a different height anyway (I think) and your second story windows are different from the first story so the slight exterior appearance difference doesn't seem like something to worry about to me.

I made 4 pairs of drapes for the biggest windows in my house this summer. You just need to make sure you get enought panels (or curtain width) to fit that big of a space. From what I read, your sliding glass doors are 96" wide with an additional 40" of wall space that totals 136" wide. That is a huge area to cover with the proper size of drapes. You will need drapes that are at least close to 160" wide, depending on if they are pleated or have grommets, to hang properly in that space. I also suggest hanging the drapes high enough to not hit the floor but float at least an inch or two above the floor. You may have to buy several panels or have these drapes custom made.