spending a lot of time looking at lifts. One area that I see depending on your lift height is at what point do you impact your caster angle up front. Some lifts have a cam bolt that you put in to account for the increased angle. Some lifts include lower control arms to account for the angle.
Is it true that if you do a cam bolt that you might make it difficult to later swap out for an andustable control arm due to the modification you make to the control arm attaching point to accomidate the Cam Bolt?

How high is the rule of thumb before you need to worry about angle?

It all comes down to $$ and trying to get the best bang for the buck but leave opportunity to improve.

I can afford the 2.5 TF spring lift with adapters now or save and do the RC 4" and add lower CA's and a front Adj track bar with some nice Bilisteins.

In the end it is still a DD that I want to clear 35's with and still have nice handling.

 

Stay away from cam bolts. I did AEV with drop brackets but it does lower clearance by a few inches only on front lower control arm, but not an issue unless you are rock crawling. I elected them and added aftermarket Lower arms for adjustability. It rides great!

 

Look at the ome lt kit from northridge. Great ride and handling. I'm running the hd coils and 1 inch spacers netting about 4.5" of lift with stock ca's. It's a little twitchy but def manageable. I'll be adding ca's in the future but it's not an emergency upgrade.

Cam bolts require elongating the mounting point and they aren't the most reliable method to adjust castor. They will move while wheeling. If you go to adjustable ca's later you will need to weld washers on the mounting points to return the holes to factory spec.

 

With the stock fixed arms, there is no adjustment, so caster is affected with any amount of lift. Everyone has a different tolerance for non-stock handling, but somewhere in the 2.5-3 inch range is generally where people opt to do something about it. (again, it is a personal preference/opinion. You will read posts saying they have 4 or 5 inches of lift and are still on stock arms. Just depends)

You options are:
Cam Bolts - cheapest, adjustable, but have drawbacks
Brackets - next cheapest, not adjustable, lower clearance, (added stress?)
New Fixed Arms - not adjustable, but beefier than stock arms
New Adjustable Arms - most expensive, but arguably the best option.

(the brackets and fixed arms adjust for a 'specific' height, which more than likely will not be 'your' height. Add a coil spacer for more clearance, or add a bunch of armor/bumpers/winch/carrier/mother-in-law, and your caster is off again)

Your best bet is to just get the lift you want, install it, drive it, and make your own conclusions on whether or not you need to adjust the caster...