That is all preferance,
but for one yes teh Audio GD has a Dac which he needs,
But yea bro get teh Audio GD and then get teh Lry Later. You need a good Dac and Audio GD makes a great Dac! My 10ES2 has MUCH more detail over my old oDac. That said, the Audio GD combo units [like the 10.33 10ES3 [oh wait those are the balanced onees]
Hmm well anyways get both. You need a good Dac, and plenty o POwer for the He 500 the AUdio GD has the power and Dac that you need! Getting a Lyr+Modi wouldn't be bad, but I think you'd fine more detail with the Agd Dac over the Modi, Still you can always get teh Lyr too Later in the future :3