Dan (and Sebastian for that matter), can you guys clarify for me if you're talking about the MX (
65 mm flat burr grinder) or the MXK[R] (63 mm conical grinder reviewed in the TGP)? You sounded to me above like you might have confused the two.
Sebastian, if you are considering the Super Jolly, I would not get the M4. It is a fine espresso grinder, and I have enjoyed many a shot from it, but the Super Jolly is noticeably superior in speed and consistency, and probably cup quality (though I haven't had them head to head). My point is, the Super Jolly means less need to stir, less sink shots, and more fun. If you're comparing the MX to the SJ, I would say it's probably mostly an aesthetic question, with the SJ being the "safe" bet inasmuch as there are a TON of people that know and love them; less so with the MX. If you're considering the MXK[R] that Dan is talking about above, then his advice is much more relevant than my own--the Super Jolly vs. MXK[R] is much more Apples to Oranges, something you'll want to read more about on the Titan Grinder Project Thread.