In my experience the 9200 has two things that are far and away better than the 5200:

1. Much more fun to program
2. Much easier to read it's display

The 5200 has big points too:

1. Much less expensive
2. Functionaly, it is identical to the 9200.

My advice: If budget is a big concern, go with the 5200. If not, go with the 9200. I can't see anyone regretting buying the 9200. I can only guess some people might regret the 5200 if they were ever considering the 9200.