Like was said already, make sure it is something that you really want. Like was stated earlier, anything in a 6pt in a dsm that wants to run high 10s is kind of a waste. Most of us here that have ran fast enough this summer to need a 6pt have trapped high enough to need a full 10/8pt cage. Also as you use different material and get different pt cages, the regulations on the bar thickness change. So to get the lightest cage and only do things once, really think about what you want and go for it!
If you do get a cage, I'd also opt for the swing outs. It would make it a lot less of a pain in the ass for a daily driver. I'd still say just drive/race your car until you actually get the boot for running too fast then decide if its what you really want to do. You only go the track once or twice a year, street drive it a lot more than that.
While we are all talking about our own cars, my car is getting less and less of a street car, but I still don't want to take the car that "extra" step and get it cagged. Its mighty expensive for a moly one and it seems like a 100 time bigger pain in the ass than even my Kirkey.
Local places to check out:
John (pushit...) - pm him
TNT in Blaine -
http://www.tntraceshop.com/
Mean Street -
http://www.meanstreetperformance.com/index.html
Sure there are a couple more, but those are the only places I would take my car to get cagged. Mean Street did Map's car, fast mark's cage, and a few others. I would also not get one of those kits. I'd rather pay the extra money and get a custom one that is super tight.