NTG-2 with 100' XLR Cable

[John!@#]

TG-2 with 100' XLR Cable
Is this too long?
http://www.bhphotovideo.com/c/produ...100B_G_Star_Quad_L_4E6S_Microphone_Cable.html
Will Adobe Premiere allow me to make the one side from 1 XLR mic to be copied to the right side track?

or would this be better for that
http://www.bhphotovideo.com/c/product/464552-REG/TecNec_SC150XJM_XLRJ_MMP_XLR_Female_to.html

Thanks, John
DVX100B