While I'm having nothing in general against The check, I think it is a tad too complex to be remembered by the masses. Also, in black & white the gradient really won't be done justice, but instead just look like an uninspired black & white gradient that really holds nothing of value in relation to what the gradient, while in full colour, really aims at.
The Boing Ball is much simpler... and the shape is as basic as it can get. The checkered pattern gives a simple uniqeness that makes it stand out in comparation to other circular logos. And, also, it doesn't lose relevance when presented in black and white.
I'm all for the Boing Ball. As a trademark I think it is extremely efficient, and also I find it simple and 'clean' to the extent that it feels like it hasn't aged a single day since it was introduced. But, most importantly... the Boing Ball holds some really symbolic value, that everyone that knows their Amiga history well can relate to. It was with that demo shown for some selected people at that specific show that the Amiga era began.
