I'll take a stab at helping you out as I own a '10 370Z Touring with Bose and also have a 2006 LS430. Obviously, they are two very very different cars. Everything you mentioned will be very noticeable in terms of the increased road noise and a lower level of build quality in certain areas. You might also miss the torque from the V8 as well at lower revs.
However, the interior of the Z is greatly improved with the touring package and it has held up very well over time. I have no complaints about build quality as everything feels very well put together and there are minimal cheap plastics in the cabin. If you plan to go aftermarket with the sound system, I would get a Base + Sports Package Z but then you miss the leather seats and suede door panel inserts and then just upgrade the base stereo to make that process easier.
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-320whp / 259wftlbs-
SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob
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