I can only give a view of 3 and as people say it depends on what you want it for, but here is my view of the 3 for what it is worth.
Humber, this was our first boat and came as a package , it was a 5.5 assault, this was a great little boat but with limitations. Its finish was average and there Customer service was crap. But it was our forst boat and as such we did not know what to expect - all in all it servered us well.
Porter, 6.5. this is a school boat i use for teaching. Better in rough conditions but is basic, which is probably a good thing for a school boat. A good boat for the job and cheap to run.
Scorpion 7.5 with a 200 Evinrude Fitch. We always wanted one of these, i went out on Paul Gatzels Secopion in some bad conditions and its handeling sold it for me. As people have seen from my running reports the boat has been very good to us and is coded. We purchased second hand and it took us some time to find the one i wanted, e.g looked after. The new one are very expensive.
We like the stability of the rib, even just coming out of chicester bar the we watch normal boat bobbing up and down , wehereas we just keep going, one day we would like a cabin rib so we can go port hopping - one day