ORIGINAL: MinnFlyer
One thing to note is regardless of which simulator you want, make sure that your computer can handle it.
The superior graphics that come with today's Sims require a computer with superior graphic capabilities.
good point MINNFLYER. When I got my sim I couldn't fly more than 10 secs without skipping and freezing and it was a 2003 computer. You need a good graphic card and lots of RAM