Its down to you. I run the full house and garden range with a few other additives and it makes for a fairly complicated feeding schedule but I am very happy with the results.
I know a guy who uses sugar peak grow and bloom, his green is nice and there is lots of it, but it doesn't smoke as clean as mine and doesn't get you quite as high.
His nutrients are 10 quid a bottle, in total I have spent over 300 on nutrients just for a couple of runs, I havent even used some of them but it allows me more room to play and experiment having them on hand.
I would look at Canna, Sugar Peak Earth Juice, House and Garden (I use them they rock and you won't here me banging on about anything else), Advanced (overpriced IMO), Plant Magic have a good rep on uk420 I have never used them though, Bio-bizz are also excellent and give a really nice flavour.
Give me a hint please lol