I'll be the guy who asks how frequently or intensively will you be using these tools? I don't tend to use my power tools much, maybe a couple of times a month. So I went with a line that had a battery pack that crossed realms so when I used my summer lawn tools, I didn't need to have another set of batteries around the house or multiple chargers. So far, with my light-duty work for putting together garden boxes, and a few indoor projects, the Ryobi line gets the job done. Would I bring them to a work site to frame a house? No. But since I bought the trimmer first, I just kept going with the brand. It will be interesting to see how they handle finishing the basement this summer.
But yeah, if you actually make a serious hobby out of your tools, do weekend construction for friends, or even have a property that needs more than just simple maintenance, you might want to splash out the cash for the pro-style tools.