Hi I'm an intermediate player (playing for 3 years). I have a yonex Voltric D 15 racket and factory string in it. Now, I have almost no problem with the factory string except power - which is very low for me. I can't clear from rear court to rear court without using all the strength and right angle. So I want a string that is durable enough to last a year at tension of 22/23 lbs and powerful. Right now, I don't care much about feel, control, etc. I'm not sure about wether to buy an expensive string that lasts longer or a cheap string that lasts less. Also, I live in India and only available string are yonex, Victor and a couple of zymax strings. Thanks.