Also keep in mind the EQ curve I showed you was for a GS-1 amp fed by a Northstar dac. Your's might be slightly different so adjust to taste. You'll find out very quickly that you know what sounds good to you. Just remember to make small changes.
If you really want to experiment, there are EQs that you can download here: http://isohunt.com/torrent_details/91836085/?tab=summary
I play with these all the time. Sometimes it's interesting to combine things like a 10 band simple high lift with a 30 band gentle low cut. It's like making your own Fletcher Munson curve for the 650s.....
Season to taste or turn the EQ off. It's all fun.