If you don't know anyone closeby with one you can test out, then get into a camera shop and hold a 5D2. There isn't much difference in feel between the two.
Write speeds etc are as good as any....i've not found much diff between the 5D, 5D2, 50D and 40D...until of course you go nuts with the shutter! You'll not regret it! 
Congrats Geno, awesome shot! 






