I got 2" king's springs on my Vitara but they're a little rough - too stiff. Great off road but not much good on a mainly road car.
Might be better off to get your springs reset higher by pedders or similar. I'll sell you mine if you like and I'll go to pedders
Suzisport do a body lift kit, but doing a body lift at home on Vitara's and X90's is hard work if you dont know what you're doing - too many things have car-like tolerances and need modifying if you wanna do the job right and/or go more than 1" up.
If you're not fully kitted up in your garage or keen on a little harmless butchery then pay someone.
If you don't mind the butchery (Hey my Vitara was cheap) then you can make your own 1" lift kit for probably $80 or so.
You should be able to run 235/75 A/T's either with a little body or suspension lift - otherwise they will rub a little bit. Shouldn't do any harm to your on road ability. You can get muddies in that size and they're a little worse on road but heaps better off.
your front struts can cope with a bit of lift ok - my aftermarket 1" lift ones are actually the same length as the originals and cope fine with the 2" lift, but the back shocks need urgent replacement for any offroad use, and will pretty much be topped out after the spring lift. Luckily they're pretty universal (I've used HQ shocks, Landcruiser and Cressida). For something more valuable like yours maybe some Rancho or Dobinsons.......