Hi Otis,
I'll take the first stab at replying to your post. First, as far as location goes I think Shady Canyon is perfect. Close to the beach areas we like (i.e. Newport, Corona Del Mar) as well as the business areas of Irvine. My business is located in Irvine and is less than 5 minutes from my home. We're close to everything. But I'll admit I'm prejudiced towards Shady because I'm building a home there. It's quiet, it's new, it's peaceful and it's surrounded by thousands of acres of wilderness (...wilderness by California definition, anyway. It's not exactly Idaho). The density of homes to land is very low. At 2.4m to 3m you can probably buy one of the homes on Prairie Grass or Vernal Springs. Nice homes, but not as much land as the custom lots and certainly pricier than most of the homes outside Shady. Are they a good deal? Well, I expect they'll drop a bit further before we find the bottom in the market. How much further is anyones guess. 20%. 5%. 1%. Would I buy one now? Well, I did and prices did drop a bit after I bought but not so much so that I am sorry I committed. If I were buying in your price range, I'd probably spend a few bucks more and make a lowball offer on one of the custom homes being advertised in the high 3's, and there are several of them. Many of the homes being advertised now are at or below the cost to replace them, even considering the fact that building costs are down greatly.
Good hunting!