Fly because you want to fly for fun, not because you think flying GA will be a resume enhancer.

At 750hrs any of the regionals will take you with RATP mins. If you don't have those, you can piggy back on their rotary transition program to get what you need before you start class (I've got a Hornet buddy doing this now).

1000hrs will get you on an SIC gig flying King airs at an ISR contractor as well.

If you can get off active duty flying great, if not get out ASAP and start flying anywhere. Your grey jet time will be your greatest selling point on your resume. I have a buddy hired by DAL with 400 grey jet hours and the rest VT IP time, so don't worry if you're not fat on hours when you get out.

Fly GA for fun, it won't help enhance your resume all that much compared to what's on it already.