When my hobby here began in 08 foreign lights were starting to make their mark on the hobbyist. You had a massively Surefire type dominant market and you had a lot of arguments between old vs new blood.
I won't buy a light that isn't SF.. it's just my absolute favorite by a margin that I prefer to keep growing my collection. They've been proven to me through a lot of real world abuse.
With that said.. Fenix, Eagletac, and Nitecore (I use these because I see these three a lot but there are more) have made their stand on being dependable and reliable. Many stories have accumulated over the years of people taking them to hell and back and they stay strong. Fenix was at one point the most popular and I'd say really carried the new trend in. I owned a PD30 5 years ago but quit carrying it due to not being a multi-mode fan. I beat the crap out of it and it worked. I think I also owned a TK30? TK25? One of those. I beat it too and it took it like a champ.
They were the new Chinese kids on the block and they didn't let anyone down. I'd honestly tell you to buy what has the features you want and trust it. Even as a die hard SF fan boy I'd still trust them too.
Now if you wanted to mount a light to your .50 cal and take it to Fallujah.. I'd probably tell you to go with the ones that were made for that butttt I don't think that's where this is going