Ummm, KYBs (Keep Your Bilsteins) are used as OEMs these days. The bargain basement OEM struts should be changed around 50K miles before too much of the damping goes away and leave you with a boat to handle as you have found out.
But the GR-2s are cheap struts without modern valving and priced accordingly. If you want to stick with KYB, get the Gas Adjust if it's available for your model. But they have only 3-stage valving, not very advanced by today's standards.
Bilstein HD or Sport are excellent choices if you are for handling. But these are fairly stiff but you can crank it over like you are on rails. I like their softer Grand Touring class.
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Monroes Reflex is now becoming available. These will replace the Sensatrac line which has older position-sensitive damping. Monroes are softer struts than Bilsteins but are good choices if you like a softer ride. Get their Quick-Strut for faster replacement.
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Gabriel Ultra is similar to the Reflex with inertia sensitive damping, It's got 9 stages of variable valving and they deal with road conditions better than the Reflex or KYB. With your preference, do check these out at
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Just about all aftermarket struts come with lifetime warranties today. If you are lowering, use only those approved or they'll wear out in no time.