Sure the Perfect Ten is a very, very nice 1911 but all STI are nice, even the least expensive of them all.
That STI Nitro 10 is an absolutely gorgeous gun in my opinion and you can bet your butt it'll run like a scalded ape. I have a Perfect Ten on my wish list but I also have a Nitro 10 on the same list. I already own an STI Elektra and it has flat out spoiled me, if I get a 10mm, I definitely want an STI.
If you found anything about an STI Nitro to complain about I'll be shocked. If you have the cash, want a 10mm 1911, you really can't do better, at least not without spending a whole lot more money. I'm jealous, I would love to have a Nitro.