I bought an ANRB a few weeks ago and have had a great time getting familiar with it. I'm 5 nm from KJFK right under a busy approach, so this has taken my plane spotting experience to a new level indeed!
I've learnt a good deal from reading this board and my regards to all here.
The DPD vertical is now in hand and I hope to begin the upgrade very soon. I'm also looking to set up a dedicated machine for the box as well. Our peak times here are of course quite busy and oftentimes more than half of my returns are ADS-B (not bad for America, really).
I've temporally mounted the stock antenna quite low in comparison to the slated spot of the DPD vertical, so here's hoping that the new hardware and much higher physical location will be worth the effort and enjoyable to all. As it stands for the moment, when I switch off hardware processing it appears that I'm already filling a sizable void on the network.
I only wish I had known about this earlier!
Cheers!