I have a point I think you should consider, having looked at some of the great photographers you've shortlisted.
You're not likely to find work like that from photographers in Scotland, because Scotland doesn't have that kind of light. I'm not saying this to appear smart or to put anyone down, or even to stick up for British wedding photographers. But you'll be very lucky indeed to be getting married on one of the 5 days in the year that the sun shines in Scotland.
Seriously, look at the work of the great British wedding photographers and you'll see that the look is completely different, and it's not just about photographic style or fashion, it's simply that the light is so different to California. If you want your wedding photo's to look like Bobby's site or Gene's then you should stay in California to get married, you can afford to ship a photographer across the Atlantic, but it's a bigger challenge to ship the sunshine with them.