I'm looking to change racquet and was hoping for some advise..... I currently use the K6.1 Tour 90 and like it a lot, but am finding it a little heavy and not too forgiving so am looking for something a little lighter with a larger sweet spot. My current shortlist includes the KBlade Tour, KBlade 98, KPro Tour and Head Microgel Prestige(98). I'm a 4.5 player that plays mainly doubles. Any comments on any of the above or an alternative?