I would recommend using a cultipacker... and if you're looking for an affordable one, I got mine from OMNI manufacturing. They've got a super simple design & they've recently started putting ductile iron wheels on theirs (vs. regular grey iron wheels)- which means no broken wheels!! Here's the link to their cultipacker page on their website:
http://omni-mfg.com/Cultipackers-C110177.aspx?sid=10512