Well, they don't perform that bad, a q6600 it's a 25% in performance than a 2600k.
I am confused by this statement, since it's not grammatically correct it could have few meanings.
If you mean that
a: Core2quad q6600 is mere 25perc. performance
of 2600k i7, than you are correct. It's more about 30perc., which is really really low, since
2600k is very old and slow as well by now, I keep the last one in office but I will donate it to someone.
But you are right, I didn't say they are bad computers :- ) Even old pentium4 would still be great for most tasks, I only meant it as rendering performance per watt price which I find
very inneffective. Just the "render-farm" aspect, nothing else. I am quite happy computers nowaday have quite long moral life-span, which saves good money for its value.
If upgrading HW is hard (it shouldn't!) it's time to increase prices :- ) No honestly, people under-price so heavily, imho Archviz at the moment is almost like high-end photography, you need to spend great deal on money for HW and SW, but in return you make quite a lot money as well. It's tough balance.
Sorry for the off-topic, I can't help myself :- ) Just rambling, can be easily ignored, I won't mind