Most SDB's have either XLR or 1/4" phone jacks as outputs. You would do good to have a set of 25' 1/4" (both ends) XLR ( M_F) and RCA cables. Get as many adaptors as you can conceive of. You will also run into 1/8" plugs, mostly stereo. Gold conn's are always preferable. Your MK2 takes RCA's in.
Funny, I went into a store recently to buy a MK2, but walked out with the Zoom H4n, after comparing the features. The Zoom does 4 trk, which I plan on using extensively.
Good Luck!