While those shoes are a wee bit too bright for my taste, perhaps if they were a dark navy cap toe or tasseled loafer, then maybe.To be honest, blue suede shoes, in general, do nothing for me personally - I don't have the skills to play three-dimensional clothing chess - but can't deny that those are an impressive and beautiful looking pair of shoes.
My unsolicited advice: assuming finances allow, buy them as you rarely find something that checks all your boxes on a not-common item and, rarely, do I regret the occasional purchase of some thing that I'm passionate about, but I have regretted passing on an item I really wanted to only find, I couldn't find it again when I did try to buy it later on.
I wholeheartedly agree with the rest of your post as to regrets, I have at times experienced the same. While I do not have much need for anything regarding wardrobe , every once in a while something will pop up that I find difficult to resist and whether I need it or not I won't let it slip away, in most cases no regrets. No kicking myself for letting it pass.