We just switched from a drill to an old 15" planter.  With the cost of treated seed these days, we were throwing out too much seed with the drill.  I liked the 7.5" rows, but the inability to really control population and depth drove me to the planter.  You can get some really good deals on old 16/31 planters with boxes, since nobody wants to deal with that many boxes.  Ours was cheaper than a 12/23 or 8/15.