if you've got bent valves you will have damage to the pistons and or bores. depending on the severity of the damage you may need a new bottom end too.

take the head off first and assess the damage. post pics up too so others can help advise how bad the damage is.

i'm not sure about interchangability of heads so personally i'd be after an identical one. wouldnt want any suprises of incapatability for whatever reason, sensors may be different for example.