Core from all the reasons mentioned plus:
1 - You get the flat portable display with it, so you dont need to buy an external display unless you want to upgrade. The flat display has more functions than the portable.
2 - More reliable and less reported issues than with portable.
3 - If your 24 nose is like my 27A nose (carbon free nose) you can install both antennas infront of the rudder pedals. Works very well for me.

That said, portables are still a great solution for clubs and the poor folks who own multiple gliders...

Ramy