Digital BW, The Print

Hello everyone,

It's been a couple of years since I've posted here.  I've been
printing BO on an Epson 1280 with good results using MIS Eboni for
matte papers and PKN using Ilford Smooth Pearl. I just upgraded to an
Epson R2400 and I have a couple of questions.  

I intend to replace my Epson carts as soon as they run out with
spongeless MIS carts and inks.

I've read all the information on Paul's and Clayton's sites, but I
haven't yet decided on whether I'll go with MIS K4 or MIS UT-3D inks
and whether I'll use ABW, QTR or Paul's UT-3D procedure. 

Does anyone have any more thoughts on the advantages/disadvantages of
these three approaches? 

Can MIS PKN be used in an Epson R2400 instead of K4 photo black?

How do the MIS K4 and UT-3D inks compare?  Are the LLK and LK inks the
same or different for these sets?

Thanks in advance,

Roger