RE: uprade from nirvana?
The Laser is a little pricey, but when you step up from the Nirvana, you're going to have to pay some more unfortunately. On a different note... the Laser was designed by the same team that designed the Nirvana. You'll notice some similarities if you ever get to see one in person. The sail material is the same for starters... but, there's more when you look closer.
Andy