The Portable Flexible is designed to be Semi Static - i.e. 1-2 out calls per week, not per day. The bag with wheels is designed to take the strain on the flat but it does not help with the lifting in, and out of the car. (I am the product manager for Affinity so I will declare an interest straight away!) The most suitable item in the Affinity range is the Aluminium with a lifting back, or the Affinity 8 for a flat table.
If you have a lifting back section, it nearly always adds 2-3 kgs to the weight of the "flat equivalent" so if weight is a big factor you need to think long and hard about whether you need this feature or not.
The Tao 10Kg couch is OK, but two major factors might put you off. 1. to acheive the lightweight design, the base of the table is made from trampoline material. I have not tested this one, but I remember testing a similar item from Master and found that I sank into the table in the centre of the two pieces, and at the fold my hips dug into the hinged area. 2. If you are doing seated treatments the metal bar accross the legs could get in the way which if you are leaning forward will put strain on your lower back.
The Feel Good product, something is wrong. With massage tables the more you pay the more lightweight or more feature packed they become. This table claims to be light, strong and cheap. This is the holy grail for massage equipment suppliers and I'm not sure that a company that also specialises in chicken coops and training tunnels could have cracked this nut! Be careful. If you buy it - pay on your credit card (in the case of chargebacks you are covered) and fully understand the returns policy. Get the bathroom scales out and check the spec. This will be the weight without accessories e.g. face cradle, armrests etc.
To check the strength/rigidity of the table go to a corner and push accross it. it should be rigid with only 1-1.5" of movement. Any more and it will not be suitable for massage.