Hey Rivermaxx! Did you get my PM?
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Since you have a MMMv3 I would use that. But if you want one of the many features that the MMX has over the MMM definitely get that. I have a MMM(probably like v10) but I wanted sensored for something specific so I just received a MMX in the mail. I am going to have have it soldered up tomorrow! BTW The mmmv3 or the MMX will power a 1717 just fine.
Yes, the batteries from Hobbyking are pretty good. They are good enough. Make sure to get batteries that are rated for at least "35c". I would get the nanotech packs.