The thing is. All of those markers can hold their own against the latest and greatest. You are paying for less weight / efficiency.look at the DM gun series.
DM3, was big
DM4 was about the same size but milled different
DM5, smaller and lighter
DM6 even smaller and lighter
DM7 slighty smaller.
Now when the DM4 was made, it would have been the Dogs. Just like the 07 ego's are now. but as technologys become more advanced, things get smaller, and lighter. feck knows where paintball markers will be in five years time.
-james