The deal from Gearhead engines sounds fantastic! The price is great, the warranty, the free shipping, the fact that you can add whatever you want to the engine, etc., etc., etc. almost sounds too good to be true. I wish that I would have looked into this a little more when I had my engine replaced. I would jump all over this engine if I were you. Heck, I may contact them and see if I can send them my old engine to have them re-build it.
I actually ended up going with a brand new Isuzu crate motor that I bought through Jerry Lemond (he visits here occasionally and is a big presence over on the Planet). He used to work for Isuzu and still has some connections with the warehouses. The engine that I bought has the updated pistons and I have not burned a drop of oil in the two years that the engine has been in the VX. I did document my experiences with the engine swap, but I can't seem to find the thread right now (I'll look and post it later).
Sounds like you found a great option to a $5k Isuzu engine, plus I don't know if you can still find the new engines as when I bought mine there were only 16 left in the country.
Keep us updated because our engines won't last forever and others may be looking for replacement options in the future.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless