I would check given that they are minbetting alot I'll be more then happy to get cheap cards here (with the chance emp is slowplaying a legit hand that will pay off if you hit)

A big bet could lead into trouble if called and you hit your stright and the flush comes or board pairs.

A small bet could be usefull if you could put him on a big pp KK-QQ (AA seems dead since he didn't reraise inless you have been stealing alot he may just call.) as I see him just calling with those holding (seeing if the flush hit's the turn) If it doesn't and you hit you should get paid off nicely.