Not having muntins produces the "blank stare" look on houses that aren't ina modern style and designed for them. The pictured houise would look really bad without them. The kind that are stuck on the inside or between the glass are OK if that' the best you can do, but having them on the outside of the glass (so called SDL, simulated divided lite) is much better at breaking up the appearance big plane of glass.

One of the subtle reasons older houses look so much better than newer versions of similar designs is that they use true divided lite windows, so each pane reflects light slightly differently, an effect you don't get with a single pane with muntins glued on. I'm afraid that's a sacrifice that most of us have to make for energy efficiency.

Thank you! Very helpful! The windows we got an estimate for has the grids on the inside. Also, the back of the house faces a golf course so we are removing the grids for a better view but there are no arches.

Maybe consider a "less busy" grid pattern to modernize without moving completely away from the grids.

Is there a reason, you are replacing windows. Those look pretty good, at least in pictures. If in fact there is something wrong with them, I would replace with windows close as you can get to what you already have.

We are looking to replace as they are the original windows from when the house was built in 1988. They are single pane as well. We just replaced all the flooring with hardwood and don’t want the sun to damage them.

if you must replace the windows you should really consider replacing with the same look that you have now. Muntins in a window don’t block a view in the least bit.