The AT 853s with 4.7 mod and card caps pair nicely with a Zoom H1xlr (with mini plug to XLR adapter so you can use phantom power) for less than $500 for a rig that can stealth or tape open using 32bit float recording, which makes the taping process a lot easier. Great starter set. You can add a set of AT Hyper caps for $100 or less if you’re into hyper too for bigger, noisier venues. I like the F3 a lot but it lacks a miniplug input (handy for stealthing and beating tight security) and costs double the H1xlr. The Tascam FRAV2 is a bit bigger than the f3 but has a miniplug input and onboard time code generator if you’re interested in mixing sources or syncing to video. An F3 is maybe $300+ and FR-AV2 maybe $400 these days.
I also love the Line Audio CM4s- nice wide, balanced soundstage that punches above its weight. And small enough to stealth in a hatiand an upgrade from the ATs. After that I agree with the comment that it is better to go high on your next upgrade to Schoeps, AKGs, or the like. I really hear the difference.
Good luck. Just remember you need $ for tickets too, and buying more of a starter kit kinda pays for itself in extra tickets…. At first