No worries. Why no need for Xeons?
I can certainly use more than 4 cores.
And why wouldn't I want ECC RAM, especially when PS relies a ton of it.
You don't need ECC ram for photoshop. ECC ram is really essential in situation where data integrity and validity must be assured, where a single flipped bit would invalidate the result of an operation. A single flip bit on a hires picture isn't all that important.