Just run Audyssey using the editor app. I usually have to go in after and change my speakers to "small" and change the crossovers to 80 hz. Denon and Marantz don't seem to like telling folks their speakers are small for some reason.
When I take my time and use all 8 positions and carefully follow the recommended pattern Audyssey gets me really close. I do use the app to tweak further, but based on measurements using rew sweeps and a calibrated mic. Without measurements you're just guessing and it's hard to tell where to apply adjustments. REW is free and a umik mic will cost you around 90 bucks.
That said, Audyssey by itself does get me really close. How you run setup makes a difference too. Low background noise, follow the pattern, no more than 2' from the first position, mic at ear height and I get good results.
