I'm a guitar collector but I have to honestly say that I've only heard about this company (Caparison) very briefly. I went to their site and although the guitars look decent, I probably wouldn't buy one as it's not much different, feature wise, from many other guitars out there. If Phil actually gets a signature model where he chooses the features, it may be worth getting but so far they are only saying that he currently plays guitars by this company.
I only own a couple of signature guitars (If you don't include Les Pauls). I have a Tony Iommi "old boy" built by the same guy that built Tony's in the 1970s (it's the guitar where the finish of it looks like it bubbled and got melted off in parts) I think my guitar is number 14 or 17 meaning there are very few out there. I have a celebrity owned guitar (from someone who I promised not to name) and I think I have one more but I can't think of it right now.
Here's Tony Iommi's Old Boy:
Anyway, It's off topic but I hope Tony gets better as he`s currently battling cancer.