I didn't know about The Forbidden Project. But you did remind me of a computer I'd forgotten about, the one from The Forbidden Planet, from the late fifties. That was a pretty good movie I think.
Kia, actually, Hal wasn't really evil depending on how you define it; he was perfectly good by design but had somehow malfunctioned. He was attempting to obey his programming but ended up throwing the baby out with the bath. That brings up another comparison thing...
Which computer is the most evil? Some were born in evil intent, like the Matrix, but some meant to be truely helpful, but turned bad, like Skynet. All were bad in the end, but heck, I actually felt sorry for Hal at the end.
"Will I dream?"
But I'm leaning towards V'ger in terms of power, not because of it's wits, but it's arsonal. Pitting wits against wits, I'd probably still go with V'ger. V'ger just flicked it's wrist and shut down all the world's 23rd century defenses, while the MCP still hadn't cracked the modern-day Pentagon alone.