Hmm, I really wouldn`t bother with those blue sky. 4" drivers are gonna give a terrible bass response unless you get a separate woofer, and for accurate nearfield monitoring, a separate woofer is just really not a good idea.

the fostex PM2`s are pretty cheap as are the pm1`s. I`d go for them if you`ve got that bit extra, or the yorkvilles if you can`t stretch.