I am trying to find out which manuf. is the Best when it comes to string trimmers. Usually after some lengthy research I can narrow it down. This time I am hearing a million different things . So I'll leave it to the pros to give me the inside scoop on trimmers. So have some fun and list your brand preference if you will, I would deeply appreciate it .To narrow it down I am looking for a lightweight, commercial grade machine with a straight shaft,STEEL driveshaft ,good power but most of all a tight-smooth unit. Yes in short I want it all! But I know somewhere out there is a general consensus among professionals as to which manufacturer rules the string trimmer industry(not the sales leader).Thanks for your help!!