I just looked at SRD and when you buy the strop with the razor you're paying about $30 for it. I think the extra $10 over the fili is well worth the fabric component as well as a real hardware.
The tip of the DE blade is sharp, but then you have the protruding part of the holder, so I suppose it may indeed be more like a round point than a square point.
If you're thinking that you can experiment with another razor later on, it'll make sense to not overly worry about what exactly would you get now.
If you don't use a brush and cream/soap (or good brushless cream) currently, I think you should definitely start. Proper beard preparation is as important as anything else.