As far as the TP1 goes, the hard box models are fine, but the Junior was always my favourite. Less weight in the handle meant they were less prone to trunnion wear and leaning. And ironically, despite being the BOL option, the cloth bag offered at least some attempt at additional filtration that the hard box models didn't.
Not a big fan of the Total System models. Adding onboard tools to a cleaner that was never originally designed to have them always seemed like such an afterthought to me. Didn't like the way the hose carrier overhung the side of the machine, the small, oddly shaped hose connection that tended to clog, or the combined height adjuster/suction diverter. The Turbomaster did onboard tools far better in almost every way, IMHO.
Speaking of which, I do feel Hoover discontinued the wrong cleaner when the TM was axed. The only reason it was too expensive to produce was because Hoover overloaded it with features, and already had redundancy in their lineup. If they wanted to cut production costs, they could have dropped the TP1 instead, and rejigged the TM lineup to exclude certain features on lower priced models (i.e. headlight/carpet height display, brush roll shutoff, air freshener), none of which were essential. The TM was designed with both separate and onboard tools in mind, so could easily have offered something to suit everyone had Hoover got the price/feature mix on each model right, without any need to offer an entirely different range of cleaners alongside as they did with the TP1.
I did like the TP2/1000/3 series cleaners, as overdue as they were, and they were very popular right up to the end. Perhaps a tad on the heavy side for some, but certainly sturdy for the most part. They didn't appear particularly dated against what the likes of Electrolux were offering at the time, and still had plenty of life left in them yet, so I was disappointed to see them go. The Purepower offered the user nothing the TP2/1000/3 didn't already, it was just quicker, easier and cheaper to build, with fewer parts, hence why it took over.