Well your ass end will be 2in higher than the front, so I'm gonna take a wild guess and say yes. That's an good amount of rake
If you're just going for stock height, stock weight, nothing special, practically anything will do: when I replaced mine to fix my sagging rear I went with some basic Moogs (front+rear), and despite them actually being slightly weaker than OEM, they've held up totally fine (and actually take weight better than I expected. Just hauled 5 steelies on 33in Falkens today and only sagged maybe 1.5in). Mind you I wouldn't trust Moog for damn near anything else.
That being said all coils will sag with wear, and there doesn't sound like much reason not to shoot for an OEM set. My biggest piece of advice is to read through threads like the
Lift FAQ and the like and brush up on as many personal experiences you can. Sometimes it helps to search your question directly on google, as 9/10 times it'll recommend you a t4r.org thread along the lines of what you're asking.
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Y2K Highlander
Millennium Silver 3.4L auto @ 320k and climbing
Toytecs + 5100s / 7.5 wrap + OME spacers + Tokicos / JBA UCAs / Anonymous Fab. LBJs / Total Chaos Gussets / EimKeith PCK + LCAR / Extended Bump Stops; Brake Lines; Rear Diff Breather / True North Fab. Hybrid Bumper / CBI Hybrid Bumper + Tire Carrier / 4xInnovations Hybrid Sliders / Opt Offroad Trailing Arms / Lil Skip Gas Skid / BudBuilt Front Skid / ARB Rear Locker