Avex have always had a tendency of putting best of albums out after a 3rd album. (Ayu, Every Little Thing, MAX, dream, BoA)
I wouldn't worry too much about the best of, I'd worry more about their sales.
Then again, a lot of other Avex artists have been around a LONG time with poor sales. IE: m.o.v.e and dream (over 10 years each).
New album has sort of been disappointing to me. I did love their a-nation performance though on the DVD. I loved the giant pink costumed character in the back doing the entire routing (very impressed as that can't be easy dressed in that). I want a plushie of that character to go with my a-nation Blue Teddy
