WTF? Civic SI Sedan?
You must be from Canada, since they don't have a Civic SI Sedan in the states.
Civic SI CANADA is equivalent to Civic EX in the US.
so.. let's see
GOlf GLS VS Civic EX
Let's compare these
Power - GLS (I believe was 115hp 2.0L), Civic EX (127hp, 1.7L)
Maintenance - Civic EX will be cheaper
Cost when purchasing - Civic EX will be cheaper
Looks - it's up to you which has better looks
Reliability - Consumer Reports says Civic's better than VW.. infact.. many VW seems to be having problems.
Ride Quality - I never ridden on the GLS, but I heard Golf has a better ride quality
So ... my summary.. I think GLS is a better car.. and u get what you paid for.. but I would personally go with a Civic EX. Becuase I like the looks.. after market parts.. and I'm not rich.. and I have it myself. I went through the battle of Jetta GLS VS CIvic EX a while back.