In my opinion theres not much that is compareable to the enjoyment of driving a csl apart from GT3's.
Porsche Turbo - Very fast, but the imo the fascination wears off rather quickly. Just doesn't feel very special apart from the horsepower.
Also has no sound
.
R8 V10 - Looks stunning imho but i have not driven one yet, so can't comment. But definitely not a good track car, if you have that in mind.
Just to give you a few more ideas, lotus exige v6, corvette c6 z06, Ferrari 360/F430 those are not a nightmare in maintenance compared to older ferraris.