by the way. in order for any N-reg machine to be legally airworty, it has to comply with any Airworthiness Directives (one offs, and recurring) and your insurance company will probably insist any Service Bulletins are also complied with.
and... if the machine is going to be operated for hire/instruction, it needs a 50 hour service too
i am quoting from memory - this is all in the FARs. you best check.