I vote for Blogs although i can clearly see the appeal/need for a UI overhaul.

For me having integrated bloggs would do away with the need of having multiple sites catering for both needs.

I've experimented with some other software integration to merge ubb with cms / blogging software, but i could never get around the multiple login issues (php is not my native language).

I wont be disappointed if UI gets the nod over Blogs, but Blogs gets my vote.

This is what i do