you will never get a definitive answer because :
A) Not many people will have owned more than one of the above and hence, you will simply get a stream of posts saying "I've got a ******** and it's the best"
B) There are many different criteria on which to judge a receiver's performance and each receiver will be strong on certain points
C) Will depend a lot on what you want to receive and how you wish to receive it, as to which may be best for you.
I haven't tried the Kaon, so cannot comment on it, although it is very popular and well supported with unofficial software patches.
I've seen the Technomate and set up a couple on motors, it is quite a nice receiver and well supported with unofficial patches, but in my opinion has been seriously and undeservedly over hyped.
I'm a fan of the Dreambox, as it pretty much does what the others do, but has capabilities to do much more, due to the Linix operating system, network connection and massive unofficial software support from several sources. The new DM500 also has hard drive capability if you do not wich to save fims to a network drive.
The biggest down side to the Dreambox is its tuner, as it is not as sensitive as some of the others, but I haven't found that to cause me too much of a problem.
This may appear to be biassed towards the Dreambox, but then it will be, because I fall pretty much fall into catagory A) as will most other members.
