We'll have to look for others to make recommendations. I only have first hand experience with my leaking xreas factory system, and then my Billy 5100 with low mileage used FJ springs.
Others would have to chime in on aftermarket springs... especially ones that don't add much lift.
From the brief reading I did, it seems that some people love the Billy 6112 for the front. The come with the front springs, so you would only need rear springs.
I got my billys from one of the forum sponsors, Total Automotive Performance, who sold me a set of 4 5100 shocks for $348 even with free shipping.
Then I got 4 used FJ springs by posting a truthful and entertaining welcome message on an FJ cruisers forum. I told a fair amount about me and my 4Runner, included photos, was honest that I was looking to find someone to sell me used FJ springs, and included a little humor too. (I think I said I was another 4Runner troll, joining their forum to look for their old junk as an upgrade to my 4R)... or something like that.
Anyway, I got two private messages from guys who said they would sell me theirs, and one of them was within an hour of me, so we met, and I got the coils.
Here's a set of 5100 shocks for $360. You'll still need springs.
4Runner4thGen5100Set - Bilstein 5100 Complete SET - Total Automotive Performance - Your Source for Auto Parts and Accessories
Here are links for 6112 for the front @ $700
Bilstein 47-260153 | 6112 Series 47-260153 | Total Automotive Performance
and 5160 shocks for the rear at $426
Bilstein 25-227611 Shocks | Bilstein 5160 Series Shocks | Bilstein Shocks
You'll still need a pair of rear springs, and the bill is already at $1126, but that may not be too bad, depending on your budget.
I went $350 for 5100 all around, plus $150 for used FJ springs, and installed everything myself for a total of $500 even, plus a good, long day of labor.
Call these guys up and ask for their recommendation. They'd be able to help you.
Good luck.