Well, I've tried many strings but there's only one that I keep going back to and that's BG80's. 32-34lbs works well for me
i'll try to stick with Ashaway ZM67, until i find something more suitable eventually. 25x27lbs at the moment, i'm quite sure i won't stick to that for the rest of my life.
If money was not an object and I could afford to replace strings regularly then it has to be Bg66U, but loses feel quickly and durability isn't great, but as I'm a professional stringer I only have to pay for the cost of the string and not labor so it works well for me. www.apbstringers.co.uk
String that may last me forever at the moment shall be BG85 @ 25lbs. 4 knots stringing on my pro kennex tm1200.