I have found that you save a bundle of money, depending upon how serious you are about audio, to spend more, and buy less. This is a diminishing returns hobby. The more you spend, the less you get. There are a lot of items that you would have to spend double your money or more to better. Take a JC5 amp. It's not a Boulder, but for us peasants, it is. I have not heard this, but Steve Hoffman highly recommends it, and while that's not everything, it's something. Check out his review. It's slightly over budget, but it sounds like you'll be able to live with it for years. You may later want to upgrade to a Lampizator DAC, BUT you'll still be able to use this to feed it. Buy less, save more. The voice of one who has spent a ton before learning this, save and spend less!
https://m.youtube.com/watch?v=vniWmD-HAoU