Yeap, listen to IPO but don't touch his target houses!
Seriously though, we were in the same boat as you in 2005 (just got married, felt like we needed a place to call our own ala HGTV) and bought a condo. We were thinking stay for 5 years, build some equity, upgrade to a bigger home when our incomes grew and our equity increased just like they promised in the realtor commercials.
Fast forward to 2007 and we sold, losing our 10% down payment in the process (transaction costs and 25k in upgrades that we did on the condo). Reasons were many for selling, chiefly that we wanted to buy a bigger place and we'd save more money by renting than losing money on our condo.
Anyways, point is...first home you buy is certainly not your last, since over time and as circumstances change, your housing needs changes, you learn more about home ownership, you know what works for you and what doesn't, what is your financial tolerance, etc. If you want to move in 3 years if you have 1 more kid, could you sell or are you stuck? If you got laid off, are you screwed immediately or can you handle 6 or more months of unemployment checks alone?
I never used to think about those things when I bought in 2005, but in hindsight, i was panicking from "being priced out forever" coupled with "nesting instincts from marriage and impending child coming" and "wanting to provide a good environment for child coming".
Good luck whatever you do!