1. Wayne is correct about the track width. O-60 fastrack is measured from centerline to centerline which, on a 5' (60") wide layout, will mean the trackage will actually overhang your layout top by about 1 3/4" on both sides, so you may want to re-think that.
2. I'm not aware that the new CW-80 has been released yet (Charles Ro shows a 4/10/21 availability date). The SKU for the new and improved version is L-1908080. It looks similar, but not exactly the same as the old version. The old one had large green and red bulbs on the top of the case. The new one appears to only have a smaller green bulb at the top left of the case and no red bulb. The handle also appears a little more squared off than the older, rounded version.
3. Depending on the length of your loops, one CW-80 may be enough to power both of them. I would try that first and see if it's enough - you can always add a second one later if you need it. With one, just run the transformer output to a terminal block like the one pictured below and then run power drops (four per loop should be adequate) to each loop.
