Janome 6700 vs 8200?

I'm coming up on a landmark birthday and decided I may treat myself to a heavier-duty machine than the one I have. I have a Janome 4120 QDC, but honestly would prefer something with a little more "heft" to it. It's a great machine and I love it, but something a little heavier duty might be desirable.

I mostly piece blocks and tops, and may try some quilting on my own. I don't make garments, and I'm pretty much an intermediate sewist. Any suggestions you have are welcome! Thank you!