I have a P&H Delphin 150 in Surf Spec (which they sadly don't make any more) and it's a very capable boat. I'm 5'7" and 110 lbs, and it isn't the tightest fitting boat I've owned, but the ratcheting thigh braces and the full foot plate mean that I can lock myself in pretty well.
The boat comes alive in surf and swell, and it inspires confidence. When I initially tried it, I found that it behaved very different than my Avocet LV (which I had for ages) in surf, and there was almost a learning curve to be one with the boat. My Delphin now feels like an old (adrenaline filled) friend.
Paddling the Delphin on flat water for an extended trip isn't exactly fun, and I wouldn't have one as an only boat, but you have an Explorer for that.
Stay away from the Delphin 155–it will be way too large for you. My husband owns one, and it's a completely different boat. I test paddled the Hammer (sadly only in flat water) and I was lost in the cockpit.
Do you plan on surfing in deep water, or rock hopping as well? I have come to appreciate the bounce-ability of plastic boats. My Delphin's hull is a mosaic scratches and gouges, but it has bounced over sharp barnacle covered rocks that would have shattered a composite boat. This durability comes at a price, as my 15' tank-of-a-boat probably tips the scale at 60 lbs. The non Surf Spec boats are a fair bit lighter though.
I also have an older Illusion, and it's great at surfing for a 17' boat, but I prefer my Delphin when I head for surf or rock hopping. The Progression looks like it would be a fantastic surfing machine, but I wouldn't have the heart to bash one against rocks... I also probably shouln't get another kayak...
Regardless, whatever boat you decide on, I would highly recommend renting one for a couple days and paddling in some conditions and not just flat water.