Know what you're saying mate but there is still some very good music being made beyond the 70s. I'm 45 so lucky enough to have seen Led Zep, Sabbath, Santana, Neil Young, Floyd, John Martyn, The Stones, The Who and a whole load of classic bands in their prime.
As an Eagles fan you may enjoy The Jayhawks, Wilco and Teenage Fan Club. For lyrical content with meaning The Arctic Monkeys make some great comments whether you like their tunes or not.
Having said that a lot of the old school musicians have recently been putting out some truly excellent albums - Dylan, Springsteen, Mark Knopfler &