I've never seen your kitchen (or any pictures of it) and thus don't know how your tiles or countertop or paint or cabinets will look like under different lighting, so I have no way to know which would make your colors look best, but my inclination is to go with PAR38 bulbs in 6" cans, because that gives you the most options now and also in the future to change if necessary, or if better/cheaper LED lights come along. I've generally found high color temperatures (4000K and up) look best with white cabinets, which turn yellowish under 2700K light, but that wood cabinets look best with lower color temperatures. But the differences between halogen (about 2850k) and 3000 or 3500K are more subtle. I lean towards the GE 20947 halogen PAR38 bulbs I mentioned earlier, in part because I've used them frequently and can vouch that they give off great light (a 2850K 100CRI halogen won't dull colors like a 2700K 82CRI CFL does), an even well-focused beam spread, and not much glare. And the light bulbs themselves look good, more so than many LED floodlamps currently available which look more like showerheads or jet engines with visible heatsinks. The halogen bulbs have a rated 3000 hour life; by the time they burn out there should be a much larger, higher quality, and cheaper assortment of LED retrofits available then there are now; indeed, a halogen bulb now and an LED replacement two or three years hence could be less expensive than an LED bulb now. I don't notice much heat from them when installed in an 8' ceiling - they're much further away from you than the lights on your rangehood, and considerably bigger but only slightly higher wattage (and wattage correlates with heat). If you're really concerned about adding any heat though, maybe something like the Home Depot Commercial Electric 5"/6" LED modules (or another similar brand) would be better - they're cool, not wildly expensive, efficient, 3000K, but also only low-80s CRI. You can put a PAR30 bulb in a 6" or 6.5" can, but doing so requires a conical trim kit to look good (so there's no big gap around the bulb), and I've never liked that appearance - the fixture looks too big for the bulb - but getting a PAR38-capable nonetheless gives you that flexibility, whereas a 5" can can use only a PAR30. Myself I still prefer to use 5" cans for PAR30 lights for the neater appearance. Long necks or short necks are a choice only for the PAR30 size; other sizes have only one common shape. The long-neck bulb is more common in residential fixtures, and most of what you'll find in consumer-oriented stores. Cheap bulb extenders are sold in hardware stores that will effectively turn a short-neck PAR30 into a long-neck version, and sometimes the socket in the recessed fixture can be adjusted in or out to suit either. The short-neck PAR30 (or smaller bulbs) are a good option when dealing with shallow ceilings though where big cans may not fit. But most times (and nearly all times if there's an attic above your kitchen), there's plenty of space for a normal-depth large can.

https://www.duttonbrown.com/collections/sputnik-chandeliers You could purchase this inexpensive fixture and spray paint it the right color. https://www.wayfair.com/lighting/pdp/mercury-row-defreitas-18-light-sputnik-chandelier-mcrw6155.html?piid=24003163 Variety of blue and multi colored sputnik fixtures

I think I have found a solution. I can’t find anything in the chandeliers or wall sconce lines that I really like or would mesh the two. I’m going to buy this fixture that is very discounted and switch out the shades with something like this and possibly dangle a few crystals from it. Then is will marry the glass sconces and the silver chandelier. It is appropriately sized and looks more like a foyer fixture imo. I also have a Casablanca ceiling fan in the middle of this room and plan to use the same type of crystal shades on its light bulbs.

Thanks for your insights, Christopher. The Deco fixture is one of my favorites, so I'm happy to get a vote for that choice. It's really difficult to find just the right piece...do you have any sources and/or pieces you could recommend? I've spent hours scrolling online and I'm still not super excited about anything...