I,ve fitted the Deldana kit - it's solidly made, everything fitted first time, it's good value and shipped swiftly.
I used the strut spacers & shock extensions to complement my longer Ironman Springs and RRO coil spacers, as a way to get regular travel out of my stock struct & shocks.
I don't do "extreem" off road, so I can't comment V longer shocks struts, but this was a cheap fix.
I'm not too sure about using Deldana's 2" coil spacers also available as an alternative susp lift, but all the Brazilians seem to like it - see Anderson Chuna's web site
Their other kit is good - I have the skids as they're cheap & were shipped quickly