I don't think I would be permanently locking in those cabinets by putting granite on them. They look pretty good in appearance for oak, but I'm thinking that you may decide to replace them sooner rather than later because they have issues with their functionality. (No drawer stack, don't go to the ceiling, barrier island, short crown and no light rail to hide under cabinet lighting, etc.) Then you'll be disappointed that you won't be able to reuse the granite and will have wasted 3K that you could have spent on the new kitchen. Live there at least 6 months or so before deciding anything.

I have no experience with Designer's Choice, but I know lots about Cabico. They have a terrific, quality brand of cabinet, they offer many choices, and several budget alternatives. If you have any specific questions, I'd be happy to answer them. Also, they do have a website that you can refer to. I highly recommend them.

I can't upload photos from here, but they wouldn't be a big help because when I saw how beautiful my (special, expensive, no VOC) plywood was I said that we couldn't cover it up with laminate, so the cabinet maker found a place that could do a factory finish on it. My cabinet doors are bamboo, and the interior is maple. When I was going to do the laminate they use with the ordinary plywood and fiberboard, I didn't like the maple color. It was too pink and I thought it would look awful with my yellow bamboo. I looked everywhere for a kind of retro speckle, but most of them, like everything else nowadays, look like stone. And the colors of most of the laminates are wrong, including the boomerangs and other decor patterns. I ended up choosing a premium maple that has a texture (which I really didn't want, since the whole point of the laminate is for spongability), but it was the yellower maple that would look good with my doors. Which is a long way of saying it can be whatever looks good to you!! Choose something wild and fun, or restrained and woodlike, or in between. The standard thing to do in glass doored cabinets is to finish them like the doors. Therefore, in your top cabinets, you could have basic put on, and paint it to match. Or you could choose an accent color that will make your things look good. For instance, if your tureens and vases, or whatever you're going to put up there, are mostly white porcelain, they'll look better against a dove gray or soft green than the creamy color I believe Hush is. As for the rest of the cabinets, going with a color that matches your doors is the elegant thing to do. Or a soft accent color, such as the dove. It helps if the edges of the boxes, which show when the doors are open, are veneered to match the doors, however. You could do bright red, or do each section a different color, but matching the paint is the "right" choice. Trust your instincts. You know what you like and want.

I had this situation. I really liked two different GC's, but the one I was leaning to (based on numerous home visits, checking website, state license and local county business license and more) used only one custom cabinet maker. Their quote for twenty three lovely built and painted cabinets came in at $23,000 without any drawers, glass cabinets, pullouts or more. I really wanted glass cabinets to lighten up my space (with UCL and LV interior), I really wanted drawers and stacks of drawers; I wanted a few typical cabinet add-ons, and really wanted to the ceiling with crown moulding. So I declined this GC's offer based on cabinetry alone. It was an equally great contractor who did my somewhat challenging kitchen: new hvac run and make up air, older house with uneven height to ceiling, lots of new electrical, and a fussy homeowner who wanted everything finished to a tee. My cabinetry charges came in about $6 less and I got all that I wanted as described above. It's not always straightforward which way to go on this question. In the end, it's really a personal decision on a multifactorial question. Good luck OP.