My racquet of choice for the last few years is the extended 27.5" PK Q+5X Pro (310). I'm using Fairway leather grip and few grams of lead at the hoop. Strung specs: Weight - 345 g, Swingweight - 346, Balance - 31.4 cm, Twistweight - 15.5, Recoilweight - 189, Polarization index - 0.545, MGR/I - 20.11.
Very happy with this racquet, tested more than 30 frames in the past and still own several other frames like Prince, Volkl, Wilson, etc. but keeping them just for experiments with lead tape and measurements.