school me on the ga645zi (input request)

[emraphoto]

i have been eyeing up the fuji rangefinders as of late. i had always loved the idea but couldn't come to terms with the vertical format (or so i thought) and therefore never tried one out. in fact i have never even held one.

so, i have some questions. in particular about the ga645zi.

how fast is the autofocus? i realize it isn't going to be a d3/e3/1dmkIII or nothing but lets say in relation to perhaps a contax g or hexar af (which i found to be STUPID fast). does the lens remain in the position you focused on or reset?

can someone give me a quick rundown of the manual focus process? i have heard it is 'fiddly'. if used in manual focus and aperture priority is there any shutter lag?

this may seem a silly question but how useable is the camera in a horizontal framing capacity? is it just something you need to 'get used to' or are there genuine difficulties?

i have also pondered the ga645i (i am quite happy with 1 focal length)... any thoughts on the two compared?

and lastly, if i may, WHERE CAN I FIND A BLACK 645zi?!?!?!

thank you very much for your thoughts.