My vote goes to Harvester from Socom 3.
Here are some other greats...
SOCOM - Blood Lake
SOCOM II - Fox Hunt
SOCOM 3 - Crucible
Combined Assault - Prowler
Confrontation - Urban Wasteland
Cold Front - Nightstalker/Blizzard equally
SOCOM 4 - Von Hein Express.
FOXHUNT!!! Without a doubt. I think it's still the best ever Socom map of all time with The Mixer running a close second.Of course that's just my opinion, I could be wrong.
its wierd because I rarely sniped on foxhunt. I use to rush up the middle and kill on the snipers scanning the bushes for enemies.
I would have to say Prowler. Basically the only thing to do on that map was snipe. Unless you and a friend played Prowler respawn for a warmup and just layed on the bridge with M60's and sprayed.
Prowler was actually a very good map for Infantry combat, but you had to really use teamwork and as much stealth as possible. I used to rock the G36C and sneak behind enemhy lines and take out their Snipers one by one, and then hit all of the guys camping the bridge from behind.