I don't fish "jigs" per say but I fish a lot of football jigs with hula grubs and other assorted plastics. For me its not so much the weight of the head but the weight of the attached plastic. The two weights I use the most are 1/8 and 1/4.
I throw 1/8 plus heavy plastic on a medium power.
1/4 plus heavy plastic onmedium power, this has worked very well but I am thinking a building a medium heavy rod, mainly because I am thinking is buying more 3/8-1/2 jig/tube heads.
1/8 and 1/4 plus light plastic on medium light
There are lots of good rod blanks out there pick the brand/best deal and I'm sure you would be happy. I'd look for a rod that is a medium or light medium heavy. Maybe a medium St Croix or 3 power mag bass blank.