Rollcage kit?

My demon is a bare shell and at the bodyshop for paint and having Billy Reilly's AlterKtion and Street Lynx put in. Mini-tubbed and sub frame connectors are on the to do list. Now I'm tossing around the idea of throwing a cage in it while its easy to do. Probably an 8 point and to save time and money I figured I would just order a kit. Are there any kits you guys might suggest that have a good fit and quality right out of the box? I'm shooting for 550HP from a 416 so I'm hoping high tens on the strip if I get it there, so a cage will be needed as not to get the boot from the track. Not worried about losing backseat, never seems to get used in my last couple of cars.
I know the shop my car is at has very good welders, I just dont want to pay $75/hr for them to be cutting checking cutting welding etc. When I've seen kits for a couple hundred bucks on the net.

Thanks