There are going to be dozens of great options for you at that price or less.

What you choose should be based on...
- rider weight.
- intended use(road)
- reliability
- product weight
- ease of maintenance

I dont understand the appeal of difficult to source spokes.
I dont understand the appeal of super low spoke count.

So all this is coming from a viewpoint considering the above

Get some handbuilt wheels either locally or online. There are plenty of options.
Wheel weight is most noticed when starting, so saving 100g is great to know as a gear junkie, but not wildly noticable when riding since it just doesnt affect riding a lot.

Proprietary spokes...why mess with them if it isnt necessary(and its not)?

There are a handful of great 23mm wide rims which are 25-35mm deep. They cost $50-150 each. Some quality butted spokes and quality light hubs will be great.

Boutique hubs are sweet...and expensive. They turn the wheel just like less expensive ones.

You should weigh your current wheels before buying anything so you have a baseline weoght to compare to potential new wheels.

Then you should figure out what you dont like about yoyr current wheels and shop accordingly.

My newest set weighs 1600g which is plenty light for me at the price and quality i want.

$425
Handbuilt from prowheelbuilder.com
H+Son Archetype rims with butted Sapim spokes laced 3x to Bitex hubs. 28h front and 32h rear.
I could have gone lighter(and less expenive) with less spokes, but at my size and use, i dont want to mess with lower spoke count.

There are tons of great handbuilt wheels at the $350-700 price range.