Which Logosol is easy for ripping

[alsayyed]

One week ago I have received the Logosol milling machine. I have watched the CD which supplied with the brochure . I could not make my mind which machine I should pick. There is one I think the M5 where you can hookup a chain saw and push the saw and it will do the cutting is that simple like this ?.
The other one the M7 is electric but it works on 3 phase power. Know the question has anybody on this forum could tell me which model I should go for and why.
I like the one that  works with stihl chainsaw better but do not know whether it is powerful when it is coming to ripping a log.