I'm sure you won't be disappointed in the Pilot Alpine 4s.
Put mine on two weeks ago in place of the Bridgestones, what a difference, quieter, better ride and the grip is fantastic in both wet and dry.
I can second that. I've got Pilot Alpin 4's on mine, in fact I did a 12 report feature for EVO Magazine on them last year and they're superb. I find not only do they offer miles better grip in very cold/snowy/icy conditions, in wet conditions around 7-8 degrees they are fantastic. So sure footed and they cut through standing water with ease.
Not only that, I even think they add a level of refinement to the ride quality that the Bridgestone summers simply can't compete with.
Brilliant tyres, probably going to be ordering some for my Wife's 1-Series too.