Your $2k budget won't get you a Sony setup unless you find a good deal used. The $1600 for the EM5mkII is about as good as a deal as you will find new. That leaves you $400 to work with. If you already have strobes, then I'd spend $300 on a 60mm macro or a 9-18mm wide angle depending on what you like to shoot. If not, then that $400 should go to getting you at least one strobe and the arms. You can potentially find a used deal on an EM1 or EM5mkII on here that would give you more budget to work with.
I shoot with a EM5mkII right now (though in a Nauticam housing). The 60mm is a fantastic lens if you like macro.