I am considering the purchase of a mid-capacity spline drive or SDS-max drive rotary hammer (1 1/2" to 1 9/16"). I was looking at a Hitachi spline drive (DH38YE (?)) and a Makita SDS Max (HR4000C (?)) or spline drive (HR3851 (?)). I am not sure of the exact model numbers.
Right now, I use SDS Plus exclusively. Does anyone have any input regarding these tools (or similar tools that have performed well)? Is SDS Max preferred over spline drive? Spline drive seems to be the older system. I will be using these tools to drill/drive ground rods and to drill holes in old and new concrete at or near the maximum solid bit capacity of these tools.
I appreciate your comments.