To oversimplify, there are two approaches:
Stiff spring, soft bar
Soft spring, stiff bar
Your eibachs would fall into the soft category imo (roughly equivalent to 500/200# linear springs). That would make the front just a little stiffer than stock, and the rear about the same (a little stiffer for pre 89 cars, a littler softer for 89+ cars).
If it were me and you had to buy a matched set, I'd go with the Tanabe. They're half the weight of the other choices, and they focus mainly on stiffening the rear (~120% stiffer than stock as opposed to ~20% stiffer up front).
My thoughts are that the stock front bar is actually pretty good, its the rear that needs the most stiffening -- especially with the eibach's soft rear springs and your staggered tires. Plus, with the softest front bar of all the aftermarket offerings, the ride quality shouldn't be that much worse than with stock sways.
My second choice for a matched set would be the ST's. They should be about the same improvement up front, but not quite as stiff in the rear as the Tanabes.
If you didn't mind buying brand A front, and brand B rear, then I'd recommend the Tanabe front, Whiteline rear. The whiteline front bar is just too stiff for most setups imo (I'd pretty much only recommend it for stock, whiteline, or tokico springs), but the rear bar offers more adjustments that lie in what I feel is the appropriate stiffness range (which are just a little softer than tanabe's rear bar)
cliffnotes on my estimated best setup for you:
1) Tanabe front, Whiteline rear
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2) Tanabe front/rear
3) ST front/rear
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4) Whiteline front/rear
2 & 3 are really close and could go either way, but I think the Tanabe/whiteline combo would be best by a significant margin.
Again, this is just my best guess. You might try contacting Wiisass as I believe he had some sort of FEA program that would aid in making these types of decisions.