I've used Luxilon BB ALU Power Rough with Prince Original Synthetic gut, which is 10 or 11 dollars per racquet (I think) but right now I have Lux crossed with Wilson NXT, which is not so inexpensive, but the the first hybrid I mentioned is good, both of these hybrids I have with Lux @ 60 in the mains and the crosses at 58 with the other string