I am building the basics in my wardrobe and I found a navy blazer that I am pleased with.
With that being said, what is the next must-have sport coat that I should begin looking for?
The look I am working towards is a simple and classic style by building a collection of more timeless pieces. My work environment is business casual so suits will be rarely employed, but I want to rise above the mundane slacks and dress shirt. WIth that being said I do live in south Texas so some of the heavier fabrics don't have nearly the utility here that they would elsewhere.
I did invest in a navy blazer that I am pleased with but I am not sure what is the next "must have" coat to incorporate.
I'd go for a mid-blue odd jacket, then light or mid-grey, then either brown or green.
I agree with Withaque about the shoes, trousers, and shirts.
Shoes; dark brown oxfords; mid-brown monks or loafers
Trousers: off-white cotton chinos for summer, mid-grey flannels for cooler weather
Shirts: white, cream, light blue solids; and a couple of blue/white checks and stripes