If anyone wants a bit more info about what the numbers all mean...
We are very nearly out of our Golden Age and do not know exactly what our reasearch will be when it finishes, so I have looked at the last turn before our Golden Age started (820AD - you'll find it in the last term 3 TCIT) and taken the gpt and bpt for different science rates. The attached table gives the % science, and for each setting the gpt we will have available for rushing culture (from Civ), the bpt we will be putting into research (from CivAssist) and an estimate for research on Electricity (from TechCalc) based on the bpt, map setting and being the first to research it. This will not give a completely accurate result, but will give an indication of what we will get once our Golden Age is over.
My views:
We have plenty of specialists, so out of 0%, Lone Scientist or 10%, I'm sure we could spare one specialist costing us 2 gpt for some research and the difference between 0% and 10% is 57gpt, so lone scientist is the best there for me. which would give us 519gpt for rushing.
Then we come to "moderate" research. We do not have a definition of this, but Rik Meleet put it around the 50% mark which would give us 205gpt to play with and Electricity in 13. It costs 316 gold to rush a Library after 1 turn and 236 for a Temple the same. So we'll need a lot of gold to rush this stuff! 205gpt won't let us rush either each turn - we'll have to let it build first for a while and we really want to rush culture quickly. But we have to balance this against the time we take to research - but how low do we have to drop research before there's no point? If we stay focussed and stick to one path without detouring along other routes or for optional techs we can probably stay ahead for a while at quite a slow research rate, 13 turns is probably OK, 17 turns (40% - enough for a Temple every turn) we can probably stay ahead for a while, 22 turns (30% - enough for a Library each turn)?
I would have posted this in the discussion thread a lot earlier, unfortunately work has got the better of me and I just haven't had the time....
Estimated Research After the Golden Age: