I am replying not as an expert, but as a novice who has recently considered the same set of questions. I had a very similar list of rods as finalists.
(1) It is true that in some sporting endeavors there is a certain minimum level of quality that is needed to ensure that one is getting a usable tool. So, an ultra-cheap Walmart starter set of golf clubs may be next to useless, BUT there are clubs made for beginners, and beginners need not use Pro-V1 balls. My understanding of the situation with Spey rods is that all of the rods you mentioned will function perfectly well as a first rod---with no loss in performance. I have heard experts say the TFO, or Echo, or even the very reasonably priced Redington Prospector are great fishing tools---what you get (or should get) with more expensive rods is better cork, cosmetics, finish, guides. So, you probably can't go wrong with those at the lower end of the price window.
(2) Some rods are more forgiving for beginners---like a Meiser Highlander or Anderson Explorer so you might keep your eye out for that.
(3) I was told that at least a 7wt (400 gwt or more) and at least 13' long would make feeling the load and timing easier. (I partially ignored this point. I initially wanted a light troutspey rod, maybe an 11' 4wt, BUT I bumped up to a 12'6" 6wt in light of this advice. The 7wt seemed too much for any use on home waters).
(4) One is frequently told that getting the right line on the rod is CRUCIAL. This turned out to be the deciding factor for me. I could get an excellent rod (Anderson Explorer), reportedly beginner friendly, smooth, and versatile, AND included in the price was a line matched to the rod by the maker. I liked the idea that this uncertainty (line matching) was taken out of play. ( I was also avised to get the grain weight towards the high end of the window for load awareness).