Sounds like you've had bad luck with the strimmers you got; there's some really cool semi-auto models out there that'll make the string feeding process a breeze.
I did a bit of research before buying a cordless Black+Decker. I got it from Amazon for a hundred bucks and it's served its purpose beyond well, I'd definitely say it was a good purchase.
A bit of research before going for the buy will go a long way. There are a bunch of good reviews out there,
the one I found was pretty complete, but there's really enough out there to have your pick.
