This may seem dumb, but I am wondering what the minimum cc's you guys will go for on a string trimmer. Bigger is always better, but what will reasonably get the job done. I'm not out to whack brush either, just trim grass. For example, I own a shindaiwa eb-630 and I can tell you never would I want something that is less than its 60 some cc engine. Let me know your opinions. BTW I wont be surprised if I start a big debate.