Since the details of your order are not yet chiselled in stone, then I will venture to offer a bit more, since I am looking at the same rig, or perhaps the 35P.
The contour windows are listed in at $630 in 2014 sheet. My initial impression of the contour windows was: Wow!! Are they ever ugly!! The windows are already small enough as it is; but that ugly WIDE band of black framework going across the centre of the window, not only blocks a lot of light, but actually makes the window look even smaller, if they are not in fact actually smaller. Pictures of side-slider make the window look bigger, and allow a lot more light to enter the rig, not to mention unencumbered picture-view of your surroundings.
While side slider windows might not seem be as versatile as crank-outs in a rainstorm, in actual experience, since the sliders have screens over the windows, water merely runs down the exterior screen when it rains, unless you are experiencing one big honkin' rain storm.
We currently have crank-outs in the bedroom on our old rig; and I really like that feature, not only for unpredictably rainy nights, but they are great for adjusting and fine-tuning the bedroom the cross-breeze. But for the rest of the rig, we are happy with the sliders, and the choice for our new rig.
BTW, have you actually seen floorplans, options, or pictures anywhere for 2015??
