I need some clarity

try experimenting with different upgrade AC power cords on any / all components that have detachable cords. Every cord sounds different, & they don't even perform in exactly the same way when placed on different components. Try out some different silver cords, cables, & speaker wire. Silver can definitely add some zip to a lackluster combo.

Dweller has identified your main problem. I used to sell MMG's retail, and while they are fun little speakers for the dough, you will not get crystal clarity out of them no matter what's before them in the chain - they lack the extension (both in frequency and dynamics) and resolution/articulation you want, and they add a grainy texture, all resulting in a comparitively veiled, midrangey sound. If you're a fan of the Maggie spatial presentation (as I am), maybe you ought to check out a pair of the 1.6QR's; I suspect you'll find them to be much smoother, more open, and more detailed. I also suggest that you address your speaker issue before making changes to your sources or cables, because if you try to do those things first, you may not like the balance that your choices have given you once you acquire more truly revealing speakers. Get something better to hear your system through, speaker-wise, and then you can focus on making upgrades elsewhere, knowing you have a 'clearer window' through which to evaluate options in the rest of the chain.

Get a turntable

After buying a turntable, it might be worth it to check out speaker placement and room tunes. Moving speakers a little bit can make a lot of difference. 'Rives' has a website which can help with placement of speakers and the listening chair. See if it makes a difference. Moving speakers and chairs costs less than other options, so start there and move up.
Good luck.

Sticking strictly to cables, I would strongly recommend you try Mapleshade ICs and speaker cables. Mapleshade offers a 30-day moneyback, and clarity is their strong point. The more expensive Omega Mikros (same designer) are even better.