128 better fot one shots and clicking style, it is better for AK, awp, and 80 is better for fullouting style, better spray definitely with m4. Usp and deagle in 80 is better for me too, but thats individual mb.
"dlmax is how much/fast counter-strike can download ingame. it's related to cl_allowdownload "1". Unless you're in a public server with 10000 mods, this command won't even matter or do anything for you, so its value doesn't matter. It can be anything from 0-512. I'd appreciate it if people didn't just scream out what command they use like it's the correct one because you don't even know what it does" from sk-gaming
"Cl_dlmax determines the “fragment” size for chunks of player decals, etc. that are downloaded while playing the game. Clamped to 16 to 1024 bytes. Useful to try and limit decals from taking up a lot of bandwidth – this made a lot more sense back when everyone was on 14.4 kbps modems."