My thing however is new it is $300, but used it is astronomically cheaper. However, the 4k one isnt old enough to have cheap used ones. The size difference doesn't bother me, both are a lot smaller than what I used to use, so I'm happy. Would you say the difference is worth about $800ish?According to the BM site, the price difference is around $300. For that, I would likely go with the 4k for the additional capabilities. Note the differences in physical size/dimensions and how that affect how you use.