You could use those vxb bearings, you could also make your own pillow blocks, I asked on the forum what people thought of the vxb bearings and knowbody had used them. What I am going to do is make my own blocks and use the thompson super smart ball bearings, they supposedly have excellent wear and load ratings, they are around $25 a piece, but without the pillow block that supports them. The shafting is very reasonable, but with pre-tapped holes it is around 3x what it is without. a good site for thompson bearings is
http://www.qbcbearings.com/, I think the vxb bearings would probably be fne, I just cant gaurantee it. It will be hard to make the blocks with a bridgeport unless you have a reamer that is the od of the bearings that should be a very snug fit in the block.
As far as the liner from msc that is meant to line linear bearings similar to pacific style bearings. Which are also an option, i am going to use them on my z axis, they are cheaper and are excellent bearings, but with most of them the shafts need to be paralell whithin .001in. I definatly would recommend a supported shaft.