The GDI Watchtower Artillery

I've not tried the SR Arms. From my understanding, your effective range drops by a whole square, hence reducing the effective range from 3.5 to 2.5 but the artillery is armed with an arm that can grab targets and bring them in closer and do stronger damage. I'm quite conflicted as I have set my defense to start picking up from as far as possible plus bringing in enemies closer faster doesn't really appeal to me.
STATS:
Defense Points Usage:
- 30
- 3.5 - Effective Range
- 5.5 - Maximum Range
- 2.5 - Effective Range
- 4.5 - Maximum Range
- Any Enemy Infantry
- Zone Troopers
- Any Tank (Except APC/Pitbull)
- Anti-Tank Aircraft

Upgrade Research Cost:
- Credits: $300,000,000
- Research: 600,000,000
- Credits: $35,000,000
- Research: 70,000,000
The Titan Artillery is so far my favorite defense unit, it is also the most expensive to upgrade. It's pretty bad ass and totally recommend it. Most of my bases have 3 of those minimum because they work and work very well.