Well I've heard good things about the GH line, I think most of the guys at the shop I buy my gear at uses GH. I'm actually using Cutting Edge Solutions (which is owned by GH) for my base fertz.
The next thing to look into is additives, I use some stuff called "Bud XL" by House and Garden and what it does is pulls the sugars from the leaf and stems to the bud sites; some stuff called "Fish-Mix" anything fish is great for your plants and it usually an organic option!; next is stuff called "Roots Excelurator" also by H&G is probably one of the best "roots" additive on the market, in my eys, i use this to enahnce root growth...more roots more fruits!; also this stuff "Top Booster" which you only once one week in the flowering period but what it does is during the 4-5th week the bud production rate drops dramsticly and when you add this product basicly creates like a "Round 2" of bud devolpment...very nice stuff...my buds had buds (check out my album).....and for my bloom booster i use Mother Of All Blooms...by Mad Farmer......
So as you see i've got some variety, but this is basically what i started with except for the Top booster and i had a different booster when i started, but that less than a year ago since my first crop, so I'm still kind of a newbie as well....and by learning what products are out there and what they do you can custom fit your nute to fit your growing needs. All strains grow differnetly and it takes some fine tunning get everything perfect, but i've used this stuff with 10+ strains and gotten above average results everytime.......Thats why its so hard for me to jump ship to a new product, this works!