If you could afford the payment, I would say go for it. Just consider this as trading in your $23k vehicle for a new 06 MADA LE. 
In my opinion, the after market DVD and CAI do not really bring an additional value to the vehicle when trading in. You would be able to get more $$$ via private sale.
Just my $0.02
In my opinion, the after market DVD and CAI do not really bring an additional value to the vehicle when trading in. You would be able to get more $$$ via private sale.
Just my $0.02