I have the SC7000 and love it, but then I've never tried the TP-100 so don't have an opinion on that (or how it compares).
Perhaps it might be useful to see what spares are available (and how much they cost). You'll need to replace the filters and different nozzle diameters are useful, so a great tool which is also cheap may not be the best buy if you can't afford (or can't get) consumables for it.