If you don’t want to splurge, your best bet is this YMC Coat. It's a terrific piece, while not very costly. Another good option is this Helmut Lang Coat. While the price is not too high, be sure that this item will become a wonderful addition to your wardrobe. You may also want to look at this A.P.C. Coat. This item is not expensive either, but it will make a difference in your wardrobe.
If you're not a thrifty type, then what you're looking for is this Miu Miu Coat. It's more expensive but worth your money. Why not take a look at this Sacai Coat too? Expensive, but worth every penny. And one more item you might be interested in is this Thom Browne Coat. 'Cause you deserve nothing but all the finer things!