Hi,
There are bundles for IPS which include a combination of ASA (either 5510, 5520 or 5540) plus IPS module (either AIP10 or AIP20) and K8 or K9 software. There's also a DC option.
The comparison chart for ASA's is here:
http://www.cisco.com/en/US/products/ps6120/prod_models_comparison.html
Note that if you go for the 5510 you'll need the security plus license to get A/S failover.
Once you've decided on the model you can then choose a bundle, all of which are here (note that a bundle is a combination of one ASA and one AIP module):
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps6120/ps6825/product_data_sheet0900aecd80404916_ps6120_Products_Data_Sheet.html
K8 versions of software are available even though they are not listed.
Finally, you need to purchase "Services for IPS" to get the signature updates (valid for 1 year) which also includes a smartnet contract.
You also need two of each (two bundles, and two services for IPS) as there is no discount for just running A/S.
HTH
Andrew.
