Not everyone will agree, but I would like to suggest:
de_train
de_chateau
de_piranesi
cs_deagle5
de_cpl_mill
lol. Are these in the rtv vote list? If not, can they (+ cbble) be? 
Also, awp_snowfun:
http://www.fpsbanana.com/maps/289
There’s a map that I used to play a lot on my ex’s server called aim_dualsnpumpsbetal. I thought it was lots of fun. Duals + pumps + low grav? Lots of noobs didn’t like it so much cuz they suck, but it’s a fun map to mess around on, imo.
You can’t find it anywhere online anymore, but I have a copy somewhere.