brendon, hi! i have both the CFR pro-500 p/h & the 400 with port-a-heat, strongly recomend the wonder wand & cfr tools & cfr cleaning products... both machines are extremely good in there productivity, drying times are quicker, plus no continued dumping & refilling... i mostly use the 400 machine, the 500 i use as a back up or for larger jobs.... make sure though that if you get a cfr system, you'll need to keep the main filter pristinly clean, wax on carpets can block the filter, so you'll need to remove & flush separatly... the 400 is well adequate for any job, the single vac has no bearing on the quality of performance, because of the way that it is designed to work with the wand & tools... would not recommend using a rotovac with this system though... regards charlie