Most tuners and stereos will hear MW stations, sure, but I think they lack the flexibility and selectivity (so important, particularly if you're chasing stations on the 9 Khz splits that are common everywhere but here in the US...) to be real DX machines. I'm not into MW DXing, but know of quite a few that are...
A good box loop would wake up just about any radio, but you will have limitations...Mike