well, it all depends on what you want to do with it, and how much time & effort you're willing to spend. The arduino boards are great diy, and teleo are a bit more prefab (hence the increased costs).

teleo is also a more mature hardware platform. the arduino ide is still in alpha (v3. right now).

what are you trying to acomplish??

Friend of mine is working on a roundup of sensor boards, so stay tuned.

Variables to ask:

- do you want MIDI or data in some other format? - form factor - sensor attachments . . . and many other questions, too. Lots of alternatives here.