The Nesika is a good action, but for the money, look at Jerry Stillers actions such as the Viper, Diamandback, Rattler, Python etc. They are $950 and come with trigger guard and tapered rings. That saves $200 at least over others.
He also is making a new one for custom varminters called the Predator that is about $650 I think. Here is a link to an article on them http://www.6mmbr.com/index.html
The article is on the home page, about 3/4 the way down in the blogs on new products.
His actions are second to none and are used by lot of BR shooters both the short and long range game. they are strong and extremely smooth operating.