2004 Chevy Aveo Worth replacing my engine? Best option?

Engine Mechanical problem
2004 Chevy Aveo 4 cyl 60,000 miles

My 2004 Chevrolet Aveo's timing belt broke, bending the engine valves (a very common problem for '04-'07 Aveos). Mechanic is quoting me $2600 to replace the engine, but I don't want to do it if it's likely that I'll need other expensive repairs in the next couple of years, which leads me to a few questions:

1. If I replace the engine, is it likely that I'll have other expensive problems in the next few years? I realize you don't have a crystal ball, but I'm hoping someone here might have an idea of what I can expect based on any knowledge/experience with Aveos.

2. Are certain engines more reliable than others? What about better deals? I have no idea if the mechanic quoted me the price of a new engine or a used one, but from my understanding Chevy claims to have fixed the timing belt/valve problem in 2008, which makes me think I should look for a new(er) engine (For the record, I don't need a souped-up engine for performance--just one that won't break if something happens, like the timing belt snaps)

3. At this point, is it smarter to spend $3000 - $5000 on an older used Toyota or Honda (which are supposed to be more reliable) than replace the engine?

Additional details: I use my car primarily to commute. About once a week, I drive 70 miles each way to my boyfriend's and work meetings. My car has about 60,000 miles and no warranty. It's an automatic. I had other problems before it broke down, but I'm not sure how serious they are. The shifter sticks pretty badly when pulling out of park and, recently, the car started making a humming noise around 60 mph (wondering if that was from the timing belt?) Plus creaking noises when making slow turns. I also replaced the battery, which seemed like a premature repair.