Yeah Reapers the normal choice for the budget, it's ok - fairly complex routing paths can be done but can be a bit mind boggling.
I would recommend Harrison Mixbus (I think that might be made by Ardour as Tom suggested) it sounds really good, got built in tape saturation, EQ and various compressors all set up on the mix window ready to go (a bit like an analogue console if you've ever used one) easy to use and the gain staging set up well so it'll take a bit of abuse before it cr@ps out.
If not you could go the 'Hackintosh' route.....