My question would be directed to the steps you follow in preparing a board.
What do you find the two planes can not do easily?
The BUJ was the subject of a Finewoodworking article that showed multiple blades
being ground to different angles, for different procedures.
I recommend Jim Tolpin's "The New Traditional Woodworker" to further your
inquiry into tools to fit the way you make things.
The recommended finishing step is often some combination of cabinet or card scraper
followed by light sanding to show any divots, tear out or low spots.
http://www.leevalley.com/us/wood/pag...=1,310&p=46266
If you haven't taken any instruction yet, it might be a good time to get a handle on what you have
before getting more tools.
Concerning block planes, I would look for something the size of a traditional Stanley #3
before getting a really small block plane.