I agree with Barney, CRL came to mind when I first read the title to your post. Problem is, they aren't set up to deal direct. I have a reseller permit, and I think that is the only way I was able to get an account. You might find the CR Laurence website useful for getting ideas. There are many types of hardware systems to attach glass. Here is a link that might be useful: CRL online catalog

Wondering what you decided for the railings? We are in the same spot. Just finished TREX for the floor/decking but plan to use pressure treated for railings and keep posts pressuretreated. We tried the BEHR solid stain that is marketed to match the TREX colors. Hate it! The stain looks like dirty brown paint. Now looking into semi-transparent stains to let some of the wood grain show through but do not want to compromise on the protection factors. Read about Ben Moore and their Abercoat clear finish (?) maybe apply that over a watered down BEHR for the color? Very confused and disappointed right now.

you need to work with a pro who has a little creativity because your objections really shouldn't be a big deal. To keep the p/t lumber from being visible, use a stainless steel grommet in the ipe post trim with a hole bigger than the one holding the cable in the p/t post. for the cap rail, do a metal cap rail to meet code, then router a channel in the ipe and mount it to that. Done. It'll take a little bit of design time to ensure that all your proportions are right and everything ties together appropriately and structurally, but there are definitely ways to get the look you want while satisfying the permit store. Obviously not dimensionally accurate or really thought through in terms of attachments, but here's the gist.

What you already have looks very nice and it fits the style of your house. I wouldnt change it. In fact, the light colored house in your pictures, with the iron railings, those railings look very outdated.