Top 2 in no order:
S&W M&P45
SIG P220 - I saw a few dealers that have German made ones for ~$900 on some special deal but otherwise they are ~$1100+. If they are all sold out your best option is the M&P.
Ruger SR1911 is another great choice but you have to commit yourself to mastering the 1911 to truly enjoy it. A 1911 is not like a Glock or M&P where you just shoot it dry and clean every once in a while, etc and expect it to always work. Maintenance and the ability for the end user to diagnose certain things are required. There is even a unique way to apply lube to a 1911 (if you don't think there is, then you don't know how so don't talk smack pls lol). Having said that, this becomes more of an issue with 1911 builds where parts need to be fitted and different parts of different spec are swapped out, etc so it won't be as bad if you just buy a good quality 1911 and keep it stock, but what I said still stands. Maybe you have a friend who loves 1911s who will show you everything. Or read Hilton Yam's blog. There are other good 1911s under $1000 but I think the SR1911 wins in the sub-$1000 1911 category.
Honourable mention to Glock 21SF but you either need large hands or be okay with the size of the grip otherwise it's just too big.
If you go over $1000, you can also add HK USP45 in there as well as a whole variety of more 1911s. I know you asked for sub-$1000 but with the cost of .45 ammo, 2 cases of .45 would cover the difference and that is nothing in the realm of round counts.