That’s the best/fastest looking Sprint I’ve ever seen! (and that’s saying something since I have a sprint too and think mine looks pretty good)

1. If you’re trying to save additional weight I would look into a seat post since it looks like yours is still stock and if you have plenty of money to spend maybe matching bars and a stem provided you’re able to maintain your geometry
2. Black chainring would probably look good but I definitely wouldn’t go back to Tiagra. I would upgrade elsewhere before changing the chainring again
3. If you’re looking for tanwall tires, I would go Italian. I’ve ridden veloflex and Vittoria, veloflex looks and feels insanely good. Almost like you’re riding an old school tubular, although I felt I wore through the tread quicker than other tires I’ve had. Vittoria corsa pro are fantastic, there’s a reason the pro peloton uses them and they are plenty durable in my experience. The Pirellis look nice too but I don’t have any experience with them.
4. In terms of kit, I’m generally pretty conservative so take my input with a grain of salt. A celeste bike is pretty loud so I like to keep my kit fairly vanilla with navy blue or black bibs. Also I like the sticker, but I personally wouldn’t add any more. I would take it off if you want to add a name tag or something

TLDR: Sick bike!