I own a small bungalow and have replaced many windows on it over the past 7 years. Vinyl is entirely adequate. Most of us prefer more than adequate, so I would steer you elsewhere. I have some fiberglass windows as well, and they are simply stronger and operate better than vinyl. Also, fiberglass is paintable unlike vinyl. But many fiberglass windows cannot be made to order and only come in predetermined sizes (which sounds like it wouldn't work for you).

Some criticize metal covered wood windows because the wood could be rotting away under the metal, but I really think that is the way to go. I have a few Loewen windows in my kitchen. If you have money, they are excellent windows with fine grain douglas fir. I could never afford to do an entire house in Loewen though.

I honestly think you cannot go wrong with the major manufacturers. It is mostly about the quality of service by your local window vendor and the quality of the person installing the window. Good luck with the project.

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).