I have one question concerning ASA 5500 series.
Is there any numbers, facts on how much hacking attacks they can handle. (DOS,DDOS,malware etc.)
Tricky question. There are no direct figures, it's really a question of firewall throughput and connections per second (see http://www.cisco.com/en/US/products/ps6120/prod_models_comparison.html) combined with the throughput of any IPS or CSC module (on same URL).