Advice on Yamaha Electronic Drum Set?

[Indiana Jones]

I want to buy my son a Yamaha Electronic Drum Set for Christmas.
What is a good compact model, and where is the cheapest place to buy one?

 

[ddrum]

This is the cheapest Yamaha Set...
http://drums-percussion.musiciansfriend.com/product/Yamaha-DTXplorer-Electronic-Drum-Set?sku=490906

I've played this Yamaha set and it is pretty nice. You can also get the Simmons SD5K for $399 or the Alesis DM6 for $499.

http://drums-percussion.musiciansfriend.com/product/Simmons-SD5K-Electronic-Drum-Kit-?sku=443369
http://drums-percussion.musiciansfriend.com/product/Alesis-DM6-Electronic-Drum-Set?sku=620364