First CO2 airgun for beginner.

At the beginning sorry for my english !
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Hi, I'm looking for the best blowback, co2 airgun for beginner. I'm decided for Walther CP99 Compact but maybe you will suggest something better?
I know bb's are worse than pellets in accuracy but most of the nice, not expensive replicas are for bb's. I don't need replica but I want something which look close to the true gun. I will be shooting to cans etc. 
I don't want KWC 1911, Crosman 2240.
I'm looking for something around Walther price so ~100$ is max. Are there better toys than this old Umarex ?