ATP offers some options that could save you a few hundred dollars:
On DVD - Cessna 100 Series by Decade i.e. 1960's 100 Series. The price depends on the year, 1960's is $825. The price is lower if you download revision and dont buy DVDs
Also on DVD - Cessna 120-170 (all years) at $895 (also less using internet updates)
The DVD 4 Cyl Lycoming Library is $325
The ATP product catalog is online at
http://www.atp.com/_files/ProductCatalog.pdf
I would ask about competitive upgrade offers that might be in place at the time of the order.
These digital libraries ship with ATP NavigatorV(R) and include Airworthiness Directives for the Cessna models as well as the SBs and maintenance publications. Also included is the Profile And Compliance Record tool for the ADs and SBs for the Cessna models. Revisions are weekly by download or monthly by DVD. Regulatory libraries start at $345
Hope this is usefull.