Hello i have to choose between those speaker. Both sound great but mm-1 can use its internal dac...but only 16 bits dac and my imac have 24 bits dac. For that i have to connect mm-1 with analogue cable to my imac obtain the best quality. not? For 24 bits...other question is. How much good is the dac-amp internal of the mm-1 to use with grado sr325is headphone?. If i buy bose i will connect grado directly to my imac. Worth 200£ more MM-1?.i have read some reviews that say not...help me please!