Integrated Amplifier

I want to make an integrated amplifier (i.e. combining pre-amp and amplifier) that will deliver 100wrms x 2 into 4 ohms,

and I want it to have a good headphone section because I need a good amplifier for my Grado SR-325i's (32 ohm impedance).

Also, does anyone have any idea to DIY something that looks similiar to this: