Digital BW, The Print

I presently use an Epson 2200 with IP6.  I am thinking about ordering the
Epson 3800, primarily to make prints on gloss or semi-gloss papers such as
Silver Rag, and the ability to make 16x20 prints, but with a border.  I see
that the 3800 comes with the Colorburst LE rip for an extra $200.  It
upgrades to Colorburst Pro for an additional $600, or a total of about what
IP6 costs for a 17" printer (the 4800).  

I have two unrelated questions for which I would appreciate any advice: (1),
is the Colorburst LE rip as good as IP6 for grayscale prints with canned
profiles, my main interest.  If it is not, I thought I would order the 3800
without the rip, and then get the IP6 rip (when available) if needed.  (2)
Does anyone know if the 3800 is less prone to clogging with OEM inks, than
the 4800, if it sits for a few weeks unused (I have never used one, but I
think the 4800 has some fairly extensive plumbing that may present a
clogging issue)? 

Thanks to the group for any advice!

Ken Carney