How do you determine a good indy Porsche shop?

[evo-r]

I'm in the process of searching for a good indy Porsche shop, with reasonable labor rate, that's not too far from my house (Nassau county, Long Island). I narrow it down to the following 2 shops and will go visit them this week. What should I look for to determine that it's a good Porsche shop? What's the typical labor rate?

1) Manhattan Motorsports: MMS

2) Werks 1 Inc.: Long Island Porsche Services | Maintenance | Restoration | Werks 1 Inc.