Germ, the biggest thing with those pre-bent cages is making sure it fits how you like it. You're not exceptionally tall so it may not matter to you, but I like a clean cage that tucks up into the roof and pillars. Its a shame you didn't decide on a cage before NMRA because then you could look at the cages you like and find out if it's a kit.
Honestly, if the car won't be that fast to where you have to worry about being NHRA legal, I'd get one of those Kenny Brown street cages and weld it in. I like how their forward bars are very low and run down near the bottom of the seat. And the rest is a normal 4 point cage. That will stiffen the chassis nicely and still let you drive it every day.