Dash hasn't been CPU mineable for a profit for YEARS now - it went GPU 3 years or so back, then ASIC last year.

 Monero might be mineable at a profit though, it's proven to be pretty CPU friendly - but you might want to make a point of getting a current-generation or at least "on the current process node" CPU if you want to be able to mine it profitably for more than a very few months.

 Other CPU mineable coins I can't speak to.