an agent won't necessarily cost you money - not sure how it works exactly on life policies, they could impose a fee - but you would not pay them a commission
the insurance company pays them a commission
you can look at their ratings, both financial and long term debt ...... just keep in mind that 2 years ago AIG was the highest rated insurance company and their main selling point was size and strength
i would definitely recommend looking around the AZ DOI webpage
http://www.id.state.az.us/
here is their life & health guide
http://www.id.state.az.us/consumerlifehealth.html