Best controller for scratching?

Hands down the Terminal Mix.

It has the best jogwheels in the industry for scratching (non motorized) and is super tight with Serato, which makes it THE killer controller for scratching. There are many controllers out there that are OK to scratch with, but the TM still wins for better feel, spinbacks, and profile.

The Denon is an extremely well built controller, but for me the worst of your picks for scratching, as its formfactor and the feel of the jogs for me is just not as good. Do not get me wrong I love the MC2k for many reasons, just not for scratching. (It is OK to scratch with, but I cannot pull of more advanced routines with it.)

The Mk II (I guess you mean the 300?) is somewhere in the middle of the 2. It is OK, very tight with Serato and the jogs feel decent. But it is clearly an aged controller and the jogs do sometimes feel flimsy when scratching to me.

Hope that helps you buddy.

The VCI 100 IMHO has much worse jogs and I would not consider it very good for scratching.

Most posts I read concerning Reloop reliability is actually the users fault.

Reloop have a good customer support and the thing has good warranty protection. I am using the Terminal Mix 4 now for 2 years straight as my main controller on gigs from 50 to 2k guest venues. It has never let me down, everything still works like on the first day. The construction is all metal and even though times have been rough on my unit sometimes, it still has not a scratch or ding on it.

So my personal experience with my unit has been very good and I have several fellow DJs and students of mine who use it as well to the same effect.

You are most welcome and have fun scratching!

I got into scratching relatively late in my DJ career and it is sooooooo fun!