I just got my PK ki5 315 from twe today. Interesting to try it for the very first time tomorrow. The majority of people on this forum who tried it liked it a lot. Lot of members still playing with it. It is a pretty stiff AND arm friendly racquet. There seems to be real research and tech behind it. Not just the usual marketing BS.
Something for the OP to really look in to. For all of us that like stiffer frames but have arm issues.http://www.tennis-warehouse.com/ProK...RCPK-KIQ5.html