I recently got into tennis last year after 10 years out the game, but only started buying more frames this year. I picked up quite a good few discount deals on the K Factors, IMO spending extra hard earned money just to have the latest 'BLX' models is not worth it over the K Factors which are some of the best (and best looking too in my opinion) frames Wilson have come out with. Any 'advantage' (debatable) that the BLX supposedly would offer isn't justified for someone who plays below a highly competitive level.