[Elecraft] Is SignaLink needed with KX3?

[K1NUN]

My KX3, assembled, is due to be delivered in a few days (ordered 28-Aug at the New England Division Hamfest).  I am debating whether to sell my SignaLink digimode interface that I used with my TS2000. (I am selling the TS2K to finance the new KX3.)
 
My question to the group, please, is should I keep the SL for use with the KX3, or can the KX3 operate with my computer directly and simply? (Offers on the TS2K can be made off list!)

73 and thanks,
ERIC
K1NUN