i have a really bad obsession with vintage adidas stuff! Bar that, and possibly Vivienne Westwood, oh and Breitling. I am not into brands. They complete a look as an individual piece, but for me I can make you look just as good with H&M clothes.
But I'll have a go. Ill do budget, and loaded.
Shirts, I love Zara, they feel as good as they look, come in great fits, and are fantastic value, for loaded, Gucci, worn without a tie and a couple of buttons open, they make anybody look hot, and are perfect for summer.
Suits, well, Slaters are great for suits, on a budget, free tailoring is a must, because I have yet to see anyone have a great fitting suit that has just come off the shelf. Doesn't happen. If you have the money, and are from the North West, then Nicholas Jones, in Manchester make you a suit that will rival anything you'll find on Saville Row. Not feeling that, then a black D&G, tailored, will never go far wrong.
Ties are ties, relatively cheap, and just an accessory, just ensure it is silk.
Jeans need more info than just jeans, ie smart casual night wear, what styles, too many variations, until you meet the person.
Watches, I have a strange fetish for. I own, well too many, for the discerning businessman, I would recommend a Breitling, or a Mont Blanc, depending on the build, and lifestyle of the individual.
Missed out shoes. I like shopping for shoes on the high-street, my grandfather wears bespoke shoes, but I don't see the point. As long as they are leather, and the sole is solid, then its all about finding the right pair for you.
Watches and shoes though, should be quite hefty investments.
Hope that helps!!