The reason for 16 bit is kind of strange.
When I try 32bit, my screen flickers. And I tont mean slight flickering either.
It feels like my monitor is set at 20 mhz rather then 85.
I've messed with it for a while and came to the conclusion that 16 is the only way to play for me.
If you have suggestions, feel free to share but I'm quite happy with the performance. Even 16 bit doesn't look THAT bad.
BTW nice screens :p
I hope in a month or two, I'll post similar ones. (once I upgrade)