Got annoyed trying to find dev boards for higher end STM32s and ended up taking a bit of a splurge on AliExpress junk after most sources either turned up the bottom of the bucket nucleos and a few stupid priced evel boards.
I got a bit carried away and ended up with a checkout....
An STM32H743VGT6 Dev board. Interesting choice of putting 8Mb of external FLASH on it. An SCard, a TFT header and a camera strip connector. Not the first video focused board I've seen. Not what I want it for though, it's to play with the chip.
https://www.aliexpress.com/item/1005003989830214.htmlAn STM32F407ZGT6 Dev board. Similar to the above, lesser chip, but comes with some interesting adaptions including an NRF communications module.
https://www.aliexpress.com/item/1005004389057711.htmlA STM32G030F6P6 Dev board because I have a thing for tiny micros. They make good christmas/halloween light controllers.
https://www.aliexpress.com/item/32828346568.htmlAn STM32F405RGT6 dev board I probably added to the cart before I spotted the 407.
https://www.aliexpress.com/item/4001016211320.html2xF411 Black Pill. 2xF401 Black Pill and 2xF103 Blue Pills, because they were very cheap on the sale. Might have got screwed on shipping though.
Now I just have to wait on these all arriving on the snail mail.
I think I got a fair range to try out. I do need to answer a few questions on just how much / many audio channels and filters is practical with one or several of these MCUs.
Oh and I couldn't resist a few odd sensors and SPI Flash modules and microphones and..... you get the idea. I'm £100 lighter but it was a fun bit of late night retail therapy ... in a few week I get a good few evenings of play if nothing else.