I've been reading threads and searching on this site for the last few days on the options for increasing my truck's lift with an existing BDS 2' lift and have a few questions that I'm hoping someone could chime it with their past experiences. First my set current set up is the BDS lift with HD Beilstine in the front and BDS gas 5500 in the back and running 265/75/17's (without spacers but ground the ball joint down a little). My end links are shot (again ) so I was planning on replacing with the SMaxx which is getting me thinking about other things I can do while I'm down there. In retrospect I should have done this while I was installed new front hubs, and rotors and pads all around last month... 
1. It looks like most people with the BDS lift are running additional spacers, so who is making these and what additional height would it give?
2. For the rear it looks like most people are gaining addition lift with z71 springs. How much additional lift is gained from these as I don't want to add too much rake to the back. Also it looks like the ride is pretty firm from what others are saying if your constantly riding without weight in the back or towing. This isn't my daily driver so I don't mind a little more stiffness but I don't really want it extremely stiff either. Any opinions on using z71 springs and is there any other complications caused by this?
3. Does the flipping of the Upper Control Arms add any additional height or is it done for another purpose (ie tire clearance from ball joint)?
4. Would the SMaxx end links work with any additional lift more that 2' (I thought that I saw somewhere that they worked up to 2' lift but not more than) and are people still liking them after a year or so?
5. Do tire spacers add much stress to other wheel components? I like the idea of increasing the stance a little bit.
6. Tire size - My tires are getting close to needing to be replaced so this could be another option. Probably would do it next year though
My goal is to get a good set up that would be decent for a little off roading, nothing major though, but it's is primarily used as a recreational vehicle in the mountains and at the beach (snowboard, surf, mountain biking and camping).
Thanks in advance for sharing your opinions and knowledge of what my options would be to make this happen...

1. It looks like most people with the BDS lift are running additional spacers, so who is making these and what additional height would it give?
2. For the rear it looks like most people are gaining addition lift with z71 springs. How much additional lift is gained from these as I don't want to add too much rake to the back. Also it looks like the ride is pretty firm from what others are saying if your constantly riding without weight in the back or towing. This isn't my daily driver so I don't mind a little more stiffness but I don't really want it extremely stiff either. Any opinions on using z71 springs and is there any other complications caused by this?
3. Does the flipping of the Upper Control Arms add any additional height or is it done for another purpose (ie tire clearance from ball joint)?
4. Would the SMaxx end links work with any additional lift more that 2' (I thought that I saw somewhere that they worked up to 2' lift but not more than) and are people still liking them after a year or so?
5. Do tire spacers add much stress to other wheel components? I like the idea of increasing the stance a little bit.
6. Tire size - My tires are getting close to needing to be replaced so this could be another option. Probably would do it next year though
My goal is to get a good set up that would be decent for a little off roading, nothing major though, but it's is primarily used as a recreational vehicle in the mountains and at the beach (snowboard, surf, mountain biking and camping).
Thanks in advance for sharing your opinions and knowledge of what my options would be to make this happen...