+1 on the lensmate, it's a great addition to the XT1 only negatives are you can't see the metering mode symbol, it partially blocks the back thumbwheel and it's only available in black, it looks good on my graphite xt1 though. But positives, makes the camera feel more balanced, it also helps accidental rotation of the exposure compensation dial, for me this is a major one,it's a pet peev of mine.
As for the hand grip, I bought one for my xpro1 and tbh I never used, I found the Gariz half case on the xt1 gives a much better grip, plus there's a bit of protection for the camera and it looks good.