Capped Bust Quarter Type Coin

It depends. Personally I'll either get a nice AU-58 if I can find one at a good price, or maybe I'll snag a MS63. I haven't really paid much attention to my capped bust holes yet, but I'll get there at some point. I still need a few odd types and a ton of other things, so I haven't worried much about bust type set. Though I do have my Capped Bust Dime and Draped Bust Half.

Nothing wrong with dropping to XF or low AU grades if higher grades are cost prohibitive, especially since you'll likely be getting circulated grades in the earlier bust coins. I think more important is finding coins that have great eye appeal and are representative of the series.

There are attractive coins at every grade. Make sure to get one with excellent eye appeal whether at XF or higher.

I agree with what other people are saying. The technical grade, while important, isn't the only thing to look for in type coins. When I am looking, I would pick a budget, then just look for a coin in this range of grades that falls into your budget. Don't stress too much about the exact grade or one being an AU58 over an AU55. Just get a coin that looks good with the rest of your set. If that coin is too expensive, then decide if this is a long term project and you can wait to save, or lower expectations and get what you can afford.

edit: https://www.davidlawrence.com/rare-coin/2048139
This is a beautiful coin at a decent price. Something like this is what I am thinking

edit2: I just realized you are probably looking at type 2