You asked for opinions. Mine is this: when I can buy an engine that has never been hurt with 1,000 miles on it for $7500 shipped (so, $7000 picked up probably), $6500 is not a good deal for one that has had a hole in the block and re-sleeved.
The other comparison, for the modded LS7, would be $8000 picked up vs. your $7000. So, again, your's is cheaper, but in my mind, it's like buying a salvage titled car. It just isn't worth the same and can't be compared apples-to-apples.
Not trying to get in a pissing match man, the LS7 is badass in any form.
Edit: shiping not included in the $7500 motor.