Where are you? Do you have to pass California smog checks?
If California emissions legality isn't a concern, there are other turbocharger kits available for your model year...:shrug:

RE: JRSC
Talk with tegbooster about the Jackson Racing SuperCharger for a first-hand account. There was a time when I was considering a JRSC for my '97 LS... but after researching the options and reading the experiences of others, I wouldn't use a JRSC if it was given to me.

Moss Motors has a spotty track record in supporting the JRSC line.
I don't have the link handy, but one account described a hellish customer service battle when the supercharger started leaking oil. Granted, it's one instance out of many...but it's something to consider.

Also, the JRSC is less efficient. For the same level of boost, the Eaton supercharger heats the intake air more than an appropriately sized turbocharger. And there are a very limited range of solutions to cool the intake charge because the supercharger is bolted directly to the intake manifold.

Re: Nitrous
Nitrous is certainly an option for occasional use... but keep in mind the expense of refills; expect to pay about $4/lb. And it's not a solution that is entirely without risk. I grenaded an otherwise healthy motor in my 91 GTi because of a mechanical failure within the distributor that occured while I was spraying.

But all of this is secondary to the issue of diagnosing your currently ailing motor.