I have only seen the IS300 in a stick...
OK about the turbo, well look at it this way with a turbo that is constant strain on the motor inless you do a complete rebuild. but with NA there is barly any stain on the motor just bolt ones and other such things that put very little or no stain. see coming from a NOS back ground were i am all about the HP in a bottle, see the reason i like NOS is because it HP on tap and only puts stain on the motor when u use it, when u are drvingt around noromal there is no stain...but its up to you i know what you mean by loving boost, i think everyone would love rolling up to a parking lot full or import and just stepping on it to hear the "PPPPPPSSSSSTTTT" letting everyone know you have a turbo.
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2001 sentra SE 2.0
w/ perforance package,
DTM muffler, custom cold air intake, NOS/ZEX hybrid Nitrous system 55 shot, HID bulbs all around. Ti vavle springs and retainers, Port and polished head, ported intake manifold, bored TB, port matched to gaskets, 5 angle vavle job. Eibach Sportline springs. x15.5 @ 88(STOCK) 14.8 @ 94(on the bottle),