The reason I prefer to merge my pf range rather than polarise it is with a polarised preflop range a villain can proceed fairly correctly postflop. When it's merged you put him in tough spots as you can realistically hit any kind of flop in almost any way and that can justify calling flops or c/r or whatever. Sometimes if your range is polarised you will get a ton of action just cos he's gonna be thinking that you can't have a monster "that" often, that's obv great if you have a hand, but you won't very much of the time.

__________________
For Free Money, Poker Gifts and Rakeback I recommend PokerSourceOnline.

I have to recommend Cardrunners for superb poker coaching. It was honestly the single biggest improvement in my game signing up there! Sign-up fee might seem steep, but it pays itself back within weeks.