What you won't get is automatic control of the iris
It's not a lack of "automatic control" on Canon EOS lenses -- it's a total lack of iris control. That Redrock thing someone linked to looked interesting -- and if you're already heavily invested in Canon glass that may be the headache worth exploring.
Going back to the "OP" -- the best lens options for this camera are going to be Micro 4/3 lenses, or, a Nikon to micro 4/3 adapter with Nikon mount Zeiss primes (this is assuming you're not going the cinema lens route). Remember -- it's about a 2x crop factor -- so your 50mm Zeiss prime will be 100mm equivalent on the AF100.
The cheapest route will be some adapter for lenses with manual iris controls and used lenses. There's always some guy on this forum who proudly tells the story of the five dollar Nikon prime he bought on Ebay.
The big picture is -- the lens makes your picture. The AF-100 will seem like a totally different camera with each different lens you use. There are some magnificent old lenses out there that you can pick up at low cost -- and there's an ocean of crap out there that will be more difficult to handle while producing genuinely mediocre imagery.
Compromising on the quality of your lens is compromising the quality of your images. If you're on this forum -- it's likely that your images are your business.
Meaning, I'd rather have one quality lens (and work around it) than six pieces of junk.
The bad news is that you need to factor in the cost of quality lenses to the price of this camera. The good news is that the ability to pick your lenses opens up a universe of creative options previously only available through a 35mm lens adapter.