A4000: best option for a decent mouse?

[Kronos]

there are 2 options
cocolino adapter that allows the use any ps2 optical mouse on amikit
or
Softhut sells another mouse' similar adapter which is named mr Myza or something like that

I'd guess you mean this:
http://www.jschoenfeld.com/products/micromys_e.htm

The good thing is that it has a short cable while other adaptors can get really long especially when a PS/2-2-USB is also used.