Forget Nitrous for anything except aiding spool on a big turbo and then make sure it is controlled by an ECU.

Personally in your shoes given your current spec I'd be spending the cash elsewhere.

Better ECU, bigger turbo. They will net you better and far more safer gains.

I can't remember if you went 2.1 stroker or just kept with the 2.0L.

a 35R will be a lag fest on either but less so on a 2.1 (you'd be suprised just how much difference the 0.1L makes.)

I'd say a rotated GTX30R is a far better match for a 2.0L and a combination I know for certain works very well.

Sure once going a 35R will be silly quick but to get the best from it you'll need cams, valves, double valve springs and atleast 8500rpm.

Do not under estimate how laggy a 35 will be on a 2.0L. It's bad enough on my 2.5.

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605whp
Quarter Mile in 10.9 seconds @ 135mph /217kph
0-100 kph 3.2 seconds