PB7601.4 4 Stroke
Also tried out the Echo PB770 and the Shindaiwa EB854 last fall. The echo ran good but I didn't like the power or feel of the Shindaiwa. Also ran a Stihl BR600 a few years back it didn't seem to have the overall power of the redmax's.
The Dolmar PB7601.4 is a nice runner it dosen't have the power of the EBZ8001/8050 but i'd say it runs close to the EBZ7100. The PB7601.4 is also lighter than the big redmax's.