Which ND Grad...?

Evening all

I'm currently debating which NF grad will complete my collection for an upcoming trip to the English Lakes.

I use the Lee filter system and I currently have the following
0.9 hard grad (dawn/dusk shots)
0.6 soft grad

Now I find the soft grad is not the best for the majority of the landscapes I shot after dawn and before dusk so I'm after another hard grad.

The question is should I go for the .45 (1.5 stop) or the .6 (2 Stop) to use on landscapes for my daytime photography? Or should I consider something else..?

Any input greatly appriciated

If it makes a difference I have recently taken delivery of a Tokina 12-24mm tank to use on my 20D

THanks for any advice

Anyone?

Or is this better asked in a different forum..?

I'd probably go for the 2 stop. Its better to slightly underexpose as you can recover in PP. Difficult really as its going to depend on how bright the scene is.