I'm trying them all. So far I have tried King iptv, liteiptv, and horizon, still waiting for Ace, I like liteiptv for their steady streams but the quality isn't as good as others plus they seem to be Kodi dependant, and horizon was good but a lot of their usa channels were down so I'm still considering my options. King buffered so much I could barely watch it but when it did stream the quality was great. So post trials and again thanks, except for the random pointless downvoters no soup for you! P.s. these trials are for my personal use and will not be shared.
Epic gets alot of good reviews. I just signed up to try them out for a month. /u/fr0-z3n can likely hook you up if you want to try them out for a day.
FabIPTV is one that I really liked as well.
The main guys like Express and IPGuys don't do trials, but they are very stable and typically worth the $12-15 for a month to try them out. /u/stokedcrf can probably help you out with one of those two when you are ready to spend a little cash for a longer trial.