If you're looking for state-of-the-art gas shocks, you'll be interested in KYB shocks.
KAYABA Industries is Japan's largest manufacturer of automotive shock absorbing equipment, and as such, they've been continually refining their products for over 50 years. As a result of their efforts, KYB shocks employ Kayaba Hydraulic Technology to generate smooth road conditions leading to greater ride comfort and steering control. And all of this technology comes from their experience with high performance racing.
Tire Rack offers a wide variety of KYB shocks for your passenger and performance cars, pickup trucks and sport utility vehicles. A simple search will produce a specific list tailored to your vehicle.