You can mount a 3x120 radiator internally in the top of the Lian Li A05:
http://www.newegg.com/Product/Produc...82E16811112218
It's a full ATX case too, that's also smaller than many micro-atx cases. The radiator would partially cover the motherboard unless you go with an m-atx motherboard. It would only be an issue possibly if you wanted to go with crossfire or SLI.
There's also a small NZXT case, that's close in size to the A05, that's also full ATX.
http://www.newegg.com/Product/Produc...82E16811146056
Just how small do you need it. I just saw a couple of reviews of the Corsair Obsidian. That case was built with triple rads in mind. But it's big.
You can mount a 3x120 radiator internally in the top of the Lian Li A05:
http://www.newegg.com/Product/Produc...82E16811112218
It's a full ATX case too, that's also smaller than many micro-atx cases. The radiator would partially cover the motherboard unless you go with an m-atx motherboard. It would only be an issue possibly if you wanted to go with crossfire or SLI.