jpdunc, I had the same thoughts when ordering mine.(one strobe vs. two)....I liek the control and lighting you can get with two, however, after some debate, I decided to get one.
1) cost difference, it's a lot cheaper
2) much easier to handle for travel etc.
2) with some practice, I think you can get some really great shots just using one strobe. Just need to learn how to control the light direction etc. using diffusers etc
3) you can always add another strobe later to the system if you are unsatisfied, and the cost difference is not that much.
This helped my decision to go for just one strobe at this time....