there is no "best nute" in my opinion. i use tiger bloom and big bloom, both by fox farms. however, there are tons of different nutes to use. try doing some research and finding out the best for your needs/ budget. also i would recommend going to a local hydro store and talking to someone there
I've personally used fox farms, which I switched off of because I was having some issues and it was easier for me to switch than deal with them, though I'm sure I could have worked them out. I switched to cutting edge solutions, which I have liked a lot. I am using Canna's Bio line on my plants in veg now and they seem to like it a lot. It's really a matter of preference.