With that PPM you can use pretty much any nutrient line with no worries, anything under 100 from the source is usually good enough to use any nutrient without worry (if you're willing to monitor the pH). I'd save the extra money if you're willing to pH yourself. Honestly, all of the recommendations here are great.. Dutchmaster Gold or Sensi would give you equally good results, IMO. Like riz said as well, there's tons of good nutrients out there. Sometimes paying that premium for name brand nutrients is worth it, sometimes it's not - if your budget allows I'd go with a twopart grow, twopart bloom formula. I've personally had better success and used less additives with two-part formulas.