The ADR unit mentioned is actually a Fujitsu P1620. Been using 2 in the cockpit for quite a while now and they are extremely reliable (actually, 100% reliable so far). You can buy them direct from Fujitsu on their web site for about $1,800 usd, including the 5-hr hi-cap battery. We have no paper terminal charts and never print. Bluetooth GPS shows position at all times and Bluetooth XM-Weather shows all the storms (at least if you are in the USA).
The savings from Jepp for North America coverage is over $2,000 usd per year. Not quite that much discount from Frankfurt but still cheaper than paper. Only 2 Jepp binders required for the enroutes, etc., for North and South America, Atlantic and Europe/Med. Biggest problem with the binders is the enroute charts sticking in the holders because you just don't get them out very often.