To Wii or not to Wii?

Assuming I'm in charge of a fairly small library that currently has no gaming program, I would decide which console to get by doing the following:

• Survey parents. See if they will allow their kids to use the library for gaming and see if they have a preference for which console is purchased. Use an online survey program like surveymonkey from the library website or written surveys in the library. Talking to parents will also work.
  
• Survey the kids. Use the same methods as above but could also go into the local school libraries to get feedback from them there as well.
• Research the consoles.

Criteria:

• Cost
• Interest
• Target demographic
• How many people can play at a time?
• Space--Will there be open game time or will this only be brought out on special occasions.
• Can patrons bring in their own games/consoles?
  

Decision:

I would have a tough time deciding between the PS2 and the Wii. They are both relatively low cost options that have their own advantages/disadvantages. I think my decision would depend a lot on the feedback I received. The Wii is excellent for all ages (my parents play with my kids) so personally I'm partial to that system. However, PS2 has a lot of games which are cheap to buy. Having said that, a lot of kids already have a PS2 so having a Wii might be a good way to lure people into the library to check it out.