Ok so I've been wondering what I should get. I was considering the former because it's 5 dollars cheaper, and while 5 dollars is just 5 dollars, those 5 dollars can be used to buy another FULL game on Steam. But I've realized that I want to be playing CS for a long time and that 1.6's GoldSrc graphics get unappealling... after just watching a few games my eyes are literally starting to hurt because I've gotten used to more dynamic range, better textures, etc. And more of my friends have Source, and I don't know but logically it's supposed to be more people=more mods. So what should I get? Really doesn't matter, it's just 5 bucks.
Day of Defeat: Source
Half-Life 2: Deathmatch
Total: 25 dollars
Source Multiplayer Pack (CS:S DOD:S and HL2:DM)
Total: 30 dollars
There have to be some sort of texture mods for CS 1.6, but I don't think even the strongest mods could push it to be as strong as Source. It really depends on the community. If there are more bullshit hackers, kids whose moms wouldn't let them get Black Ops and didn't know Counter-Strike was rated M, or just plain retards on 1 game than on the other, than tell me, please.