Thanks. The app that's crashing is tweetdeck.Welcome to the forum!
About the only reason to get a 32gb iPad would be if you plan on keeping a lot of movies on your iPad since they take up a lot of room!
It would take almost 3 days to play all of the music on my iPad and that still takes up less than 5gb.
As far as some apps crashing, some apps tend to do that for some unknown reason. The worst IMHO is The Weather Channel. It is about the flakiest app I have run across... so far!