J31/J32 and J41.
J31/J32 G reg all have GPS, EGPWS and TCAS now as well. What flavour of GPS is dependent on what was fitted there are about 4 different common models that have been used to comply with it.
The most common installation is this
http://www.trimble.com/products/pdf/2101ap.pdf
From the ex mil types the engine change to Garretts made a huge improvement. But its still a bitch to land.
Agreed the J41 is a different beastie altogether.