That TB20 dash looks like KITT from Knight Rider in a cool retro kind of way
That is the layout which came on the last TB20GTs made. Production wound down c. 2001, with deliveries continuing into 2002 and a few in 2003. It is basically very good reliable 1990's avionics - with the exception of the KFC225 autopilot which performs extremely well but continues to give sporadic trouble with its "smoking"
servos. The panel is factory standard except for the KI229 RMI which I got installed in place of an ADF, and the Sandel SN3500 EHSI which I put in to replace the original KI525.
I am loathe to do any more but a number of people have ripped it all out and put in a Garmin 500 which costs, with the "mandatory" GTN650 and other messing, best part of £40k. The finished job looks nice. Lower down, you can install the Aspen EFD-1000 but almost everybody has had problems with those; a colleague of mine is on his 4th one in 3 years.