Hi, Mr. or Ms. Johnson. All the answers so far are great ones -- but the bigger issue is where, exactly, is North Tustin and what are the values in the different areas. Any credible realtor can pull you the comps for 92705 from the Multiple Listing Service -- but not all comps are created equal. 92705 - or technically "Unincorporated Santa Ana," is bordered by three different cities--the city of Santa Ana, the city of Tustin, and the City of Orange. That said, there are three different school districts servicing homes in 92705, and each has a very different impact on home values. In fact, even within each school district, certain Elementary Schools are more in demand than others, and increase (or decrease) property values.
A good example is the street Fairhaven Extension. If you live on the South Side of Fairhaven Extension, you kids will go to Foothill High School in the Tustin Unified School District. If, however, you live across the street on the North side of Fairhaven Extension, your children will go to El Modena High School, part of the Orange Unified School District.
Whether this is a good or bad thing is completely personal. If your kids are already in the Orange School DIstrict, this means that you can live in North Tustin, but keep them in Orange Schools--plus, the cost of the North Tustin home will be more comparable to costs for homes in Orange, which means, generally, more affordable.
In the Tustin Unified District, Arroyo Elementary is the most preferred elementary... although they're all excellent!... and homes within the Arroyo district often get a premium price.
Head West in 92705, and you may run into the Santa Ana Unified School District, while a home just across the road will be Orange Unified.
What is the best property for you? That all depends on your personal needs. Work with a professional realtor who 1) You like, and 2) who specializes in the area you're interested in. It's a great time to buy, so go find your dream house!