cheap IMO. I think around $150 for springs and pushrods is what I spent (used)
valvesprings, pushrods and away you go. roller rockers if you want to get fancy (i didn't, most don't).
ls1tech.com will be your friend. I have bought ALL my aftermarket LS1 parts from the classifieds on that site and have not been let down once.
most people won't recommend spinning to 7k, its just not needed. If you DO want to spin that high then definately pull the pan and replace the rod botls with ARP units as they are said to be the 'weak point' when going that high up the rpm band after the stock valvetrain is upgraded. My peak RWHP is at 6800rpm, I never shift there on the street and there is plenty of power from 3500-6k in 1-4th gears. It pulls like a raped ape. Going from 6th to 4th on the highway and hammering it enduces squirely rear end syndrom