For something in the middle of the price range, we recommend considering this Studio Nicholson Shirt. While the price is very reasonable, this product is an easy wardrobe update. It's also worth looking at this Junya Watanabe Shirt. This item is ultra popular and, just as importantly, not very expensive. And do check out this Comme des Garcons Shirt! It's a very popular item and good value for money.
If you want to treat yourself, then what you're looking for is this Saint Laurent Shirt. It's more expensive but worth your money. While you're at it, also have a look at this J.W.Anderson Shirt. Yes, this item is expensive, but it does not mean it's not worth it. And how about the luxurious Fendi Shirt? Yolo, right?