If you can put your CD player on repeat with some varied music, that would be great. I know neighbors don't always appreciate it, but if you don't have that to deal with, then you should be good to go. The CD player itself will not care.
I did that last weekend with my Ohm's, I was away for part of the weekend, so I cranked them up a bit, CD on repeat. Every little bit helps, especially if you only have 2 weeks to do it! If I could, I would do it during the day too with my 3000's, but my wife works from home. Shame she can't enjoy music all day.
The break-in time is another example of what makes trying the Ohm's so great, you can't get any better than the amount of time John gives you to test run a pair!
Could be that the Mirage's won't need that much break-in time, some speakers do, others don't. At least you should be able to get some sort of flavour that they will bring to the table. Enjoy, Tim