Like Davy said you'll be able to find many Lancer and Civic related threads in the forum
Anyways looking at your requirements I'd say both cars fit the bill perfectly.
I've driven both cars and neither of them is as comfortable as an Allion or a Premio - even a CS series Lancer feels comfier. But these are in their own league when it comes to handling and "oomph"
If I were you Id' go for the Lancer - reasons OTOH are:
Lancer:
The better - looking one among the two (looks are subjective though)
Many Lancer EXs are still with their first owners and are being serviced by the agent so you can verify the mileage via the agent -( you can find all information up to the last service done by the agent even if it's not being maintained by the agent anymore )
Better ground clearance (165mm vs 150mm)
A rare sight on roads - Civic FD1, FD3, FD4 all looks the same and collectively there are many civics on the roads than the Lancers.
Agent support, workshop network around the country
FD4 :
Not as rare as the EX so finding a one in good nick should be easier ( I mean, near your area. You won't have to travel a long way just to inspect the vehicle)
Dashboard looks better (again, subjective)
P.S. come to think of it, I'd buy the Lancer anyways. It's a Lancer after all.