Let me give another perspective on this thread: As of having used both, I would say this.
THe AquaFX housing and hardware are the best in the biz, nice clear canisters, great aluminum brackets, comes with nice pressure gauge, flush valve, ALL John guest fittings and ball valves, and a great digital TDS meter too! The Kents housing are kind of plain Jane, no meters, jaco fittings,no included flush kit etc,ball valves etc. BUT, the Kent has a great choice of very high quality carbon blocks and 1 micron floss filters and a great DI resin bed.ANd you cant beat their HI-S RO membranes which are high quality too. The AquaFX's I think is a step down, using an average carbon block and average micron prefilters, your basic generic TFC RO membrane. SO the Kent gets the nod here in the actual filter dept. I ordered the housing kits special from AquaFX myself, used Kent Sediment and Carbon filters, SpectraPure RO membranes and dual stage SPectrapure DI resins for the best bang for the buck combo.