The new M3 will wipe the floor with every other car in this list....
...and I wasn't aware there is a new model CLK (because there is not, so that car doesn't count)
The M3 will kill the R8, and I cannot wait

The legend returns in 2007
R8, nice design but underpowered and very heavy
XKR, beautiful but very cheap interior without any high tech gadgets
CLK, old model and very, very expensive.