asterisk users - Dec 2004 - 20 BT-100 setup - what firmware is recomended ?

Hi,

I'd like to setup 20 BT-100 with Asterisk.

If I got all discussion on grandstreams right, I should put my own tftp
server and point phones to it. On phones is 1.0.5.16 firmware.

Is this one good or should I up(down) grade to certain version ? What
functionality is possible with BT-100 ? Which are user's favourite ?

Regards,

Rob.