[Mono-list] How to edit data in grid

[Andrus]

I need to convert big Microsoft Visual FoxPro GUI accounting application to 
Linux/Mac
(Microsoft VFP license agreement does not allow to run it using WINE).
Application should allow edit PostgreSQL data in grid.

Which is the best platform for this:

Python,  Dabo (wxPython)

or

GCC,  wxWindows

or

MONO

or something other ?

Is it reasonable to create this application in MONO ?

Which GUI toolkit should I use: Winforms, GTK+, wxWindows or something other
?
Is there any sample application in MONO which allows edit data in grid or
uses PostgreSQL ?

Andrus.