As a reader of any thread, not just this one, we have to make some assumptions to provide the best information with several things in mind.
In this case. I read your "specific" question, and the information in the bottom of your signature. I made some assumptions and posted what I thought to be an educated response to your post. I also made the assumption (that in retrospect maybe I should not have) that IF you had understood all of the information that I provided, you probably wouldn't need to ask a relatively basic question comparing gas/nitrogen charged shocks.
Here are a few other things to consider (at least what I try to consider when posting):
1. These forums are very useful for not only the posting party but also others that read it and or search for information later.
2. With a heavy wheel/tire combo (you specifically pointed out) a typical gas/nitrogen charged shock (not monotube) will fade quickly and not provide an adaquate level of dampening consistently.
3. With your lift you should have NO problem getting a Bilstein to fit.
4. Many people post questions when they don't really know what they are asking for.
5. I usually error on the side of providing too much information rather than a simple answer so that people can understand why I answered the way I have, or what my experience is, etc. It usually helps to understand "how" to take the answer.
Not trying to be an A$$! I have been around here for a LONG time and I am only trying to provide my experience to others in a helpful way. Not everyone likes the way I do it :cheers:
If I was looking for a cheep, temporary shock for a truck and was picking between the gas and nitrogen I would pick the Nitrogen (it wouldn't even be a question in my book).
Michael