I have had both.
I have had both a 2003 RSX-S and a 2003 Accord EX-L sedan. Let me tell you, in bumper-to-bumper freeway traffic, or 3,000 mile vacation trips the Accord whips the daylights out of the RSX. Since that's the kind of driving I do the most, I got rid of the RSX and kept the Accord. Believe it or not, the Accord's turning radius is tighter than the RSX, and gas is 20 cents a gallon cheaper for the Accord, too.
Works for me.