I've just moved to West Irvine, which borders Tustin at The Marketplace, from LA. I'm used to eating at places like Nozawa, Hump, Hamakawa, U-Zen, etc. I'm trying to find a decent place down here in Orange County, and the places I've found so far:
Sushi Wasabi: good, but wow is it pricey.. Seems to be like 30% more expensive than Nozawa, especially when you factor in the size of the portions
Kotobuki: decent, but a very limited selection of the really basic stuff.
Wasa Sushi: close by, relatively affordable, but really blah.
Taiko: Couldn't stand this place- don't know why there are lines out the door. The tempura was especially bad.
Any more of this torture, and I'll have to think about moving back!