Dang it, Kal, you've gotten your terminology all mixed up again!
Just great, now I'm mixed up too.
Entry Level (GT 220, 5450/5470)
Budget (GTS 240, 5550/5570)
Mainstream (GTS 250, 9800 GT, 5650/5670)
Performance (GTX 460, 5750-5770)
Enthusiast (GTX 465-480, 5830-5970)
... right? And then adding SLI/Crossfire to the mix mixes everything up further.
.. because of the GTX 460's performance vs GTX 465, IMO it pokes its head into the enthusiast category while remaining in the Performance price range.