Found this rather interesting..

With all of the researches and towers maxed, here are the stats:

Gun Tower:

Range - 130.2
Damage - 14.88
Reload Time - 3
Splash - 0
Slow - 0%

Big Gun Tower:

Range - 173.6
Damage - 64.48
Reload Time - 3
Splash - 0
Slow - 0%

Grenade Tower:

Range - 130.2
Damage - 66.96
Reload Time - 10
Splash - 80.6
Slow - 3%

Missle Turret:

Range - 248
Damage - 84.32
Reload Time - 7
Splash - 86.8
Slow - 2%

Slow Tower:

Range - 124
Damage - 0
Reload Time - 12
Splash - 0
Slow - 35%

Shock Tower:

Range - 111.6
Damage - 167.4
Reload Time - 22
Splash - 0 (But affects all targets within it's range)
Slow - 10%

Mine:

Range - 64
Damage - 6400
Reload Time - 30
Splash - 280
Slow - 50%