I kinda like Beast Machines Tankor and Deluxe Jetstorm, they look nothing like the cartoon though, but as toys there kinda funky, most of the Veichons were decent toys they were also different from other lines stylewise. I also agree that Nightviper is awesome, best maximal they released.

Anyways as I sadly need to sell some of my TFS I have a number of beast machines toys to sell, PM me if your interested in any of the following.

Deluxe
Blackarachnia
Jetstorm
Optimus Primal
Blastcharge

Basic
Mirage
Geckobot