Personally I would just upgrade the callaways to the level 95/96 ones available, but I am not a fan of the max or ping wedges- though I know a few people who love them. The Max wedges are 4.5 same as calloway meter speed but you lose some precision and spin. \
You could try replacing your 60yd vokey with the 50 yd max there both 64* wedges but the max meter is 4.5 as stated, kinda see how you like the Max wedge before buying the whole set.