As my collection of m-fil 300's dwindles down, i've decided a racquet switch is in order. I like the general feel of the 300's but i'd like a little more heft, power and stability, especially on returns and volleys. I feel like lately i've been getting pushed around by bigger hitters. Whatever i get ill prolly string up with weiscannon silverstring on the mains and a synthetic on the crosses. I'm looking to demo 4 racquets then choose one. Any ideas?