Windows Replacement, Any Contractors To Recommend?

[renotm 0]

Hi all,

Recently just bite the bullet and bought a 4-rm resale.

While the apt is in fairly good condition, I am thinking of changing all the windows. Reason because they looked fairly well-used but the main factor is 2 of the rooms and living room are facing the NW, hence some afternoon sun.

Does anyone out here has any good window contractors to recommend?

The windows are really big (~1.5m H x various W from ~2m to 2.7m)... which I loved but also reckon spending a bomb to replace them.

I saw some discussion on double glazed windows (heat insulation + noise reduction).

I do not have concerns with noise as the neighborhood is fairly quiet, I am looking more for heat insulation.

Any recommendation? Anyone have installed the Low-E windows?

Really appreciate all suggestions and recommendations (contractors and type of windows).