That's an inefficient design. This design http://www.talonfiremage.pwp.b…uaypbma551q3chbbgt5euuccg from the reactor list outputs at 170 EU/t and is also a 2 chamber design... however it has an efficiency of 3.4 (3.23 when looking at costs of copper to replace dual cells) compared to your 2.57 (2.26 when looking at costs of copper to replace dual/quad cells). Basically your reactor has a "running cost" of 24 UU matter to replace the copper used, compared to the "running cost" of the other design which costs 9.6 UU matter.
Edit: Also, always try to use the normal Heat Exchangers instead of always using the more expensive Component Heat Exchangers. I was able to take your design and reduce the material cost by quite a bit of gold just by downgrading all but 1 of the Component Heat Exchangers: http://www.talonfiremage.pwp.b…zxatdsemuuepdz14iyfv65ips
well thank you for telling me at least now I know now, I will keep on trying to beat this yet. but I got to admit these take a lot of time to make