Thanks wigglyamp, most helpful. Avionics are a bit of a mine field as far as I am concerned! We're basically refitting our aeroplane including all new avionics and so I'm trying to gather as much info as I can so we can specify an avionics fit and budget. Many people on here have been very helpful, so thanks.
So far our fit is likely to include:
G500
430W
SL30
Possibly a traffic system of some kind
Possibly replace ADF/DME with modern units though seems a waste of money to me
Possiby a new AP
We should be on the N reg before too long so hopefully our avionics upgrades will be more straighforward.
Cheers