I would go for the Hartke 4000 and the cab. Itd probably be easier to upgrade and it has more wattage.
absolutely go for the head/cab. get the hartke 4000 or a GK 400rb, and look here for your cab - http://www.musiciansfriend.com/ex/s...4170215126054135253?q=t&csel=0&FIND=alumabass