Best micro ATX case?

Rammy

Honorable
Depends what you are looking for really.

There's not a lot of advantages to going mATX over ATX in many cases as mATX towers are just slightly shorter ATX towers. In the case of the 350D, it's taller than quite a lot of ATX towers. In a similar kind of style, but a bit more compact, you have the Fractal Design Arc Mini.

Messing around with the format a little, there is the Silverstone SG09/SG10 which is about as small a case as mATX can get in terms of volume. The Silverstone FT03 is probably about as small a footprint as you can get, due to the tall orientation. There's also the Aerocool Dead Silence which is a bit like a Bitfenix Prodigy but bigger (unlike the Prodigy M, which is a bit of a mess).