Mcintosh MA6900 or MA7000

The MA7000 is far more linear sounding than the MA6900. The MA6900 carries a distinctly warmer aural signature. I'd take the MA7000, but that's just my bias/preference. Having never heard your GX-300's, I have no idea which amp would make for a more suitable match.

As for a DAC.. I suppose that depends on how much cash you have to spend. If you have a copious amount of change, I found that AMR's latest DAC is pretty damned nice. If you want something a bit more budget oriented, Rega's new DAC isn't too shabby (if you like that warm and musical sound). Both should form a decent match with the Mac gear.

All - I appreciate all input received. I ended up with the MA7000, purchased some Monitor AUdio GX-300's and bought a Sim Audio Mood 300D DAC. AFter about 36 hrs, burn-in, I am very pleased. The presentation can only get better from here! Now, should I invest in XLR cables to interconnect the 300D and MA7000?

Congrats on picking up an MA7000. It's a sexy piece to have in the audio rack -that's for sure. As for XLR connections... eh, it's up to you really. Since neither the 300D or MA7000 feature a natively balanced circuit, I can't see them benefiting from this connection in any major way. Still, it's always fun to experiment.(That's what she said?)

Purchased some Tributaries 8AB XLR interconnects - very noticable improvement in detail! Now wondering if I should persue new jumpers for pre out power in...

I've had both. The MA7000 is a much better unit. However, so is the MA6600. Look at that as well.