PC-BSD is good if you want to cut your teeth without having to climb out of common pitfalls to those new to the BSD world. I used it last summer and found it to be pretty good except there was some kind of bug at the time with flash which had a memory leak. Also, it uses a GPT which can cause problems later when you try to install another OS. After searching online I found a solution to dd the entire disk with /dev/null in order to wipe out the backup which sits at the end of the drive.
If you're ready for the real thing - go for straight up FreeBSD. They are extremely organized, you can go to one site for all of your questions, everything is well documented. They have pre-compiled third party binaries available known as packages in addition to all of the source which you can compile yourself. There is also a 'Linux compatibility mode' so that you can run Linux binaries.
Marketing blather. IBM is irrelevant unless you're an old business. Also, I was disappointed they didn't bring up the fact that Watson himself met with Hitler in order to help him automate the Holocaust.