[Elecraft] Digital advice sought for K2 and K3

[N2TK, Tony]

I finally am going to get on the digital modes. Never did any of the digital
stuff before so I am asking advice from you digital mavens. At Dayton I
would like to pick up the hardware I need. 
I have my K3 on order. For now I would be using my K2. 

Figured I would look especially at the Microham and Navigator offerings. I
like the idea that I wouldn't need to use an audio card in the PC. 
I have a RIGblaster that has never been out of the box. Maybe that works
fine for digital modes? Do I need more than this? What does more than this
buy me?

What advice can you give me as to what to look for, what to recommend for
hardware to use on my K2 and forthcoming K3 so that it would be easy to
switch from CW, SSB and any of the popular digital modes?

Tnx for your advice.

N2TK, Tony