Fueling & Injection - What psi gauge do i need for my fuel rails?

Hey guys, i tried searching but all i got was ads and sale items.

I've got a real quick question....I'm getting a fuel pressure gauge for my fuel rails....should i go with a gauge that only reads up to 15 or one that reads up to a hundred? What kind of fuel pressure is a pretty stock LS1 looking at?

What about a heads and cam car?

Thanks!

Examples:
http://static.summitracing.com/global/images/prod/large/sum-800115_w.jpg
or

http://static.summitracing.com/global/images/prod/large/sum-800199.jpg

I would get the second. Reason why is that the second one is a lot more presice. My stock car has 58 PSI at the rail. I ran a autometer gauge. I like it.

0 - 100 psi