Piet I'm like the others, I would make sure I had DG 501, DG 601, and DG 105. The 501 is so versatile, it can clean like no other and the protection it provides can stand on its own if you want it to. Like a killer
AIO. AW as you know is also a must have. The Nu Glass is the only thing I have found that gets water spots off glass.
And like Al said the 501 does an incredible number on white. It looks good on all colors but it just deep cleans white like no other. And if you need some correction you can add 106ff to it and I have even added IP to it with success.