Since having a reliable and secure phone is more important to me than features, I have have decided to get an iPhone and not jailbreak it.
You obviously didn't do any research then. The iPhone can be compromised via malicious websites with no user interaction. Apple is also really slow to fix such problems (fixes are often available via Cydia the same day, Apple can take months). How many malicious text message bugs does it take before people realize what Apple's focus is, making money, not security.