Hey, Russell. That's a great question.

If you can tell us what mic you currently use, that will help establish a baseline for comparison. Anyway...

I record vocals with a German-made Neumann TLM49. It's an economy version of a $4K mic, but it's still about a grand new. I got mine used for much less. All the Neumann large diaphragm mics are quality. I've used the TLM102 and TLM103, which are less pricey but still above your price point at about $400 used.

My first real vocal mix was a Chinese MXL990. They're still available today, and less than $100 new, about $50 used. I liked it a lot but upgraded because I could. One of our Showcase posters uses one on occasion and gets great sounds from it.

Your FP10 is a 20 year old design. Know it can still produce GREAT music, but I wouldn't be surprised if some new interfaces might not offer higher quality mic preamps, which can be helpful.

You can also get a mic with an integrated preamp. I had a Rode K2 with an integrated tube preamp, which is also quite a nice vocal mic. But again above your price point at about $500 used.

There will be lots of opinions on this topic I'm sure. This is just mine. smile

DC Ron
BiaB Audiophile
Presonus Studio One
ASUS I9-12900K DAW, 32 GB RAM
Presonus Faderport 16
Too many guitars (is that a thing?)