Ever since the F4s came out I pretty much just go back and forth between the F4s and STFs ; I'll get STFs, then after they wear out I'll buy F4s, and so on and so forth.
I did however buy a set of 53mm shop wheels on a whim earlier in the month; worst decision ever. They're so sluggish and laggy feeling, if that makes sense, and they almost feel a bit too rubbery. Luckily a friend of mine gave me a set of used F4 101As (54mms but they're more like 51mms now), probably gonna squeeze a few more sessions in with the shop wheels, then maybe hand em down to a homie who's in need of wheels, and then set up the F4s. I'm never making that mistake again.