Like others said, don't pass up a flying job unless it has some ridiculous training contract (like three years).

If you have a choice:

If you are airline bound: ME will serve you getter. When regional hiring resumes, assume that competitive mins to even get called for an interview will be 1500TT and 300+ ME. Once you are at the interview, some turbine time will help, but if you don't have 300 ME you will not even be called. Also some of the other folks here have missed something: Congress has a bill in process which will require (among other things) that airlines place an increased emphasis on ME time. No specific ME time requirements are spelled out, but if that law passes nobody will be getting an airline job without hundreds of ME hours.

If you are corporate bound (or possibly interested) it is more complicated. Like others have said, you will need turbine time but insurance requirements will also dictate ME time. If you are headed down this road, consider which would be easier to get later, turbine or ME? Also consider who the potential employer is...if you can get a job at 135 or even 91 operator who has larger airplanes you might be able to move up eventually. My gut feeling would still be get the twin time first...most potential corporate jobs are in ME airplanes, and lack of ME time will probably hurt you more than ASEL PT-6 time will help you.