I really don't like a lot of the sartorial options here. By the time that you arrive, you'll have missed the sales. Is the 700€ per suit or total? I'll try to advise once I have more information.
If you're happy with it, why do you need validation on here? Style is inherently intrinsic and market oriented. You bought something that makes you happy, which you've explicitly stated, so enjoy the purchase.
FWIW, I'm fairly positive that the coat was made by Belvest, which is a solid brand.
Stop trying to hard to label your style and dress in what fits you well and makes you look better. If you're consistently trying to fit your "preppy" look, you lose out on what truly complements you best.