Given what you’re looking for you might take a look at whatever Synergistic PC fits in your budget or buy used if at all possible. Another lesser known PC that sounds like it’ll do what your looking for is the Silverstar PC from Black Cat, and it might be a little less expensive too. Not much by way of reviews yet, but here’s the experience of a happy customer who’s had several other well-respected PCs in his system but much prefers these FWIW...
https://www.audioaficionado.org/showthread.php?t=46930
Hope this helps, and best of luck.