Each day I wear a single breasted, two buttoned suit with double vents at the back in one of a selection of six colours.
They vary from a boring and plain dark blue (including a boring dark blue lining) to a thick white chalk stripe grey suit (with blaring, garing violet lining) and they're all made to measure from a place we visited in Vietnam last year. For reference - and I imagine no one cares - they replaced 3 of my far more expensive but less well made suits almost instantly.
Shirts should always be comfortable because they spend more time close to your body than your wife does. Buy what feels right and buy right first time. Quality doesn't always mean expensive but an amazing shirt bought once every two years far outweighs an average shirt bought every 6 months.
Shirt cuffs are always double/French cuff, with appropriate and non-jarring cufflinks. You might have a different opinion but you're wrong so continue to buy wrong things if this is you.
I have no strong feelings on ties or belts as they are accessories to the more important things listed above.
Get your shoes right. Not because women look at your shoes before they look at your face (they do but you shouldn't care) but because you should care. Avoid clacking leather soles if you can because not only are they terribly annoying they will also dump you on your ass in the slightest rainfall.
And this is my work uniform.