Gh nutes, lucas formula in my opinion.. Im pretty new to hydro as well. Have only done one dwc grow and on am on my 2nd now.. Lucas formula is consistent and easy to run.. Some superthrive would be a good additive as well.. One thing to keep in mind is your going to have to find a way to keep your reservoir below atleast 72 degrees at the highest, more ideally though about 68.. Your also going to want to look into h202, hygrozyme, and products like that to avoid root rot... Keep in mind if using h202 you cant use any organic ferts because from what i understand the h202 will kill the organic enzymes..
Havnt really grown enough to recommend a strain.. I grew some mk ultra indica and it did great, I also did some hashplant haze which is mostly sativa and it did great as well.. The lemon skunk did die due to not getting enough oxygen(air hose got kinked)...
Good luck!