I have been using the aerogel 300 for 2 years and am considering switching to the head youtek radical mp or dunlop aerogel 4D 300. I have 4.5-5.0 strokes but due to knee surgeries and age, approaching 50, I am probably playing closer to the 4.0 level. I have been an aggressive, consistent baseliner but due to my knee issues am beginning to play more doubles. Does anyone have experience hitting with all of these frames and can give me their impressions. Thanks!