What other modifications to the suspension have you made? Most people don't go much bigger than a 7.5 inch wheel, because that is all they need. you are working with a lighter car, and a car that is setup much differently than any porsche. You will never get your prelude to handle like a gt2. Hav you driven a gt2, or are you just saying that because you have read reviews on it? It's fairly easy to get your car to handle well, and it doesn't involve bigger tires in any way, at least not huge tires.
If you want a neutral ride, go out and get a nice set of coilovers, front and rear sway bars, and upper and lower strut tower bars. That will firm your ride up quite a bit. If your tires are too large, your car is going to lag, because you're going to be dealing with a lot of unnecessary weight. A good set of 215 series tires will give you a good contact patch - I'd go with a 16x7.5 with some 215/40-r16's on there. That will give you good traction, a well sized tire that's not going to bog you down, and better prices and selection of tires. Fatter tires cost more, weigh more, and have a bit more rolling resistance, and might hinder you rather than help you, unless you have like 500 or more hp, in which case I would be out of my league. Hope that helps you out.