Digital BW, The Print

I recently posted about upgrading to an 1800 or 2400 from my 220. 
After more reflection I'm not completely sure I'm ready to spend that
much on a printer (and ongoing ink costs).  

Since I'm fairly happy with the B&W results with MIS UTR2 & my 220,
and I don't a pressing need to print larger than 8.5x11, I've thought
of getting another 220 and dedicating it to color with MIS PRO inks. 
However, 220s aren't available anymore.  I see I have the following
choices: 260, 280, 380.  Right now they will pay me to buy a 260 ($60
minus $75 rebate) and the 380 will cost about $35.  

I have a few questions about these printers though:

1. Are they compatible with MIS inks?  They're not listed on the MIS
site, but printer models change frequently...

2. Do these printers have the same problem feeding thick art papers as
the 220 and 800?  (I can use Premier Hot Press 205 on my 220 without a
problem, but that's as thick as it will go without a lot of hassle)

3. What about these Claria inks?  I know they're dye-based, but Epson
claims they are fade resistant and last up to 200 years.  Perhaps I
don't need the MIS inks?

4. Anyone know what the significant differences are between the 260
and 380 are?  The only thing I can see is the 380 has card slots to
print PC free which I could care less about.

I know this is slightly OT as a "color" post, but it pertains to my
overall strategy for printing with B&W as well so I hope it will be
excused!