Replying to Ski boots (re-worded)

ok so im looking for some ski boots. my feet haven't stopped growing (i think) so im not looking to buy the best top quality ski boot. i have line afterbangs paired with griffons. i do own some shitty rental boots that the store gave me for free. the point of this thread is what should i do?
-buy some new ones. *(if so what are some good boots for a reasonable price?)*
-keep the crappy rentals and wait a a season or two to see if my feet grow, then spend money on some high quality boots?
the rentals actually fit decently to be honest, especially for a rental.

my last thread i said my price range was 150-200. well i did a bit of research and found out i cant really get a good pair for that cheap. so im raising my price range to 200-500.
thanks