That's an impressive package to say the least. I can't believe they're offering a 50k mile warranty on it. And to think- the swap parts given you already own an alterktion would be quite cheap.
I was actually pricing out a 5.0 coyote swap the other day after riding in my instructors '97 cobra bondourant car with a 5.0 coyote swap. 450 rwhp give or take. That sucker flew around Texas World Speedway with R compound tires. Course, he's been racing for a few dozen years as well.
For what I do, (Road Racing), These are my top motor choices from each of the three:
6.1 hemi built to 392 (3.795 stroke, 4.055" bore)
5.0 coyote motor - (3.63"x3.65")
LS7 motor - 4.125" bore, 4.00" stroke