Advantages of upgrading from magnepan mg12 to 1.7?

I am currently using a yba pre and a yba 600 power amp.Audiomagic sorcerer silver interconnects and speaker cables.My digital end is a musicalfidelity dm25kw transport and dac vpi scout and a wellbournehybrid phono stage.Any input would be appreciated.thank you.
In Vegas. Just heard the .7's with optional bass panels. You may want an audition. To my ears (and of course the system they were using), they sounded better than the 1.7's. I didn't take pics or notes because I'm an SET buff; but shouldn't be hard to find. Under $2K with panels!