If your dead set on getting freestyle boots like spks, full tilts, ace of spades, etc. then just go try some on and see which ones feel the best and have the flex you like. I'd strongly reccomend taking the advice from that ^ link. and you don't really need park/freestyle boots. youll improve faster if you have a boot that works well with your foot rather than the latest full tilts if full tilts dont fit your foot right. Do what feels good bro. Cheers!
p.s. dont let the fact that I have fts decompose my argument. I tried on MULTIPLE boots before I reached the conclusion that full tilts felt like heaven for my foot shape. I got fitted and im much happier for it!!