This would be stretching the budget, but there are a few Voron variants that aren't that much out of your price range. You're going to be giving up print volume though.
Vorons are fully open sourced, very capable, etc. There are a number of vendors who offer both BOM in a box, as well as customized BOMs. There are a ton of officially endorsed user mods and plenty of community mods too.
They are a little overbuilt, but they're very capable. Depending on what you're looking to print material wise, you could shed some cost by not enclosing your printer. Or you could print magnetic panel mounts and pull panels off when needed...
The more mainstream recommendations these days are Enders (fine, cheap, expect to need to tinker), Sovol (new kid on the block), Bambu (look familiar? there's some controversy around their always connected cloud model), and Prusa (reliable, somewhat pricey given their capabilities).