anyway i was researching different window types.
actually turns modern windows are pretty high-tech.
most likely your home has the shittiest cheap ass dog shit windows ( so does mine ).
it's also not worth the money to upgrade them.
but if you're buying a new construction home you may as well look for one with quality windows.
best windows are Low-E, Triple-Glazed and Krypton Filled.
good luck affording that though.