Spektrum may have fixed all their issues as of late, but nobody runs Spektrum in my area because they are notorious for glitching during a race, in fact HiTEC started to experience glitching as well and they simply discontinued making their system once word got out that HiTEC was a dud for...
I used to race with Radiolink for many years with really good results.
Other systems I've raced with include Radiopost, Airtronics, Futaba, KO Propo, Graupner, HiTEC and I currently race with a FlySky Noble NB4
I can honestly say my lap times and consistency made no difference between any of...