Digital BW, The Print

Hello, I am one of those who bought an Epson 2100 (as the 2200 is 
called in Europe) for it's supposed high quality B/W output. This 
might be the case when matte paper is used, but with Ilford Smooth 
Pearl Paper, I get terrible metamerism (my prints get a different 
color cast depending on the light source being daylight, fluorescent 
light, ...) effects (even worse with Epson's or Ilford's Glossy 
Papers)

Before investing more money into it, could somebody tell me
1) If the Septone ink system eliminates the problem of metamerism 
with NON-matte papers such as Ilford Smooth Pearl or Smooth Gloss.
2) Is the Septone ink system compatible with the 2100 (I suppose 
that this is the same as asking if 2200 cartridges are compatible 
with 2100 cartridges)

Your answers are greatly appreciated...