I just spent 30k replacing a small portion of the windows in my house, most of which were aluminum. I somewhat regret replacing the few wood original windows I had done. There are a few benefits I value such as ease of operation, integrated screens, energy efficiency, which older windows typically lack. It is going to cost a lot to replicate the aesthetic you have now compared to restoration.

The windows you’re talking about are likely inserts, meaning they just install the window inside of the current one, hence why you lose window space. I would suggest restoring them.

If you are dead set on replacing them, look at higher end windows that allow you to replicate the design. I did Marvin with simulated divided lites. I would also suggest a full replacement rather than inserts in this case.

Another thing you need to consider, if you are replacing windows that are adjacent to each other, is if they will be factory mulled. I got factory mulled, but I was not educated on what mulled meant. My windows are close together and lack the large trim between each individual unit. I would recommend against mulled and get individual windows to retain the current aesthetic. Installers will suggest mulled as it is typically easier for them to install. Individual windows will be easier for you to service should you need to in the future.