Sorry I misquoted the LSA on the E cam
You're dumb if you think the XE series is good, especially on stock E7's or GT-40P heads. I've done enough research to satisfy myself. Huge lift means HUGE power loss and valvetrain stress. It means HUGE springs that rob even more power. Do you have any idea how much power it takes to lift 16 valves against higher rate springs an additional .050" 3000 times a minute? High lift cams mean more expensive components to keep from destroying parts (like upgrading the basic valvetrain that comes on standard GT-40P heads). GT-40P heads aren't even made to flow beyond .500 from the factory. You'll see a lower flow rate at .600 than at .500 or even .400 for the intake valve on P heads. Yeah, I haven't done any research or anything. The flow on the stock P heads intake drops after .500 lift. Exhaust is equal to a minor improvement of 2cfm or so.
If you want a performance cam, get one. If you want a lot of hype, get an XE series cam and make the same power you would with a cam with .050 less lift. The only difference is you'll be spending a lot less on the other cam combo.
The HO cam is a proven performer too, but that says nothing.
I don't care what Mr. Brainiac in CA says. The Cobra cam is NOT a good performance cam. It's a good stock AOD cam. You're better off with the stock HO cam and 1.7:1 roller rockers.