Ok...I have to admit. I have hit with so many racquets and know which racquet suits what type(s) of players, etc. I reccommend to all my friends what to look into, even if they have a company prefrence. So yes, I am a self-proclaimed racquet connoisseur but anywho, I hate to admit, I do not know much about strings. And now that I am approaching a 4.5+ level, I was wondering if anyone would like to give me a crash course. here's what I know. Natural Gut is premium string and most tour professionals use it. It is very expensive for us amateurs.....and is top quality.... multifiliaments are softer strings and provide more power and more comfort (reccommended for players with arm/hand/shoulder injuries) Polyester string is more durable than synthetics, however, many times has less playability. **However, with the new Big Banger (Poly based) is very popular on tour and many tournament players use it as well... Ok...there's a few facts that I know. I know a little bit more, but anyway, HERE'S THE MILLION DOLLAR QUESTION: what is the best string for power hitters who love to hit really hard and flat while on a budget? That also has some durability.