I have Johnson lifters in mine. Morels are cheaper for sure. Some guys have had good luck with the LS7 lifters, but many documented failures (See Camaro5 and Corvette forums)
King setting you straight on the CAM choice for your driving desire.
I too wanted a fun street car, but I think I went past that a tad bit with my CAM choice and Whipple.... those damn mods are a never ending rabbit hole
Pray stuff is nice but services are pricey... he gotta pay for that new shop he just moved into. Katech offers some head porting as well. Can't say enough good things about Katech