double adjustable vs. single adjustable

[ROBS6T8]

Hey guys and gals, I tried the "search" and didn't come up with an answer. My question... single or double adjustable? I'm looking at purchasing Varishocks for the vehicle. The car will be mostly a daily driver with a few trips to the autocross.
I have the Hotchkis 2" drop front springs and will be putting the 11/2" leafs in shortly. I have an email into Chassisworks with the some questions and have not heard back from them yet.
Seeing how money is an issue, would it be feasible to put singles all the way around. Maybe doubles up front and singles in the rear? I want this thing to handle at the autocross but I'm not ready to sink the money in for the full suspension set up, ie. links, control arms, etc.
Would Konis be sufficient with what I'm after?
Would the Varishock OE bolt ins work with the drops that I have front and rear? One of the questions I had asked them.
Thanks for the input.