The N series from washburn has come in 5 models, the N1,2,3,4 and 8. Nuno had a guitar with an N5 sticker at one point too.
The N1 was the budget option with the vintage trem, it had both pickups as "washburn" brand Available in cream, black and green.
The N2 had a strat style neck joint and washburn branded Floyd rose trem, but did have the Lawrence bridge humbucker but the neckl was a Washburn 600 series I beleive. These were Korean made, had alder bodies, maple necks with rosewood boards and and were available in natural matt, paduak stain and black.
The N3 was a japanese version of the N2, with higher specs/tolerances. A couple of folks here have had them and really praise them.
The N4 is the real deal. And there have been several different versions. The original N4s were made from alder with maple necks and ebony boards. They have Lawrence bridge humbuckers and a seymour duncan 59 at the neck. These were available in originally just natural matt, a pyroxylin wood sealent. They have also been avalable in irridescent finish, sea foam green, powder blue, vintage sunburst and black. I've also seen one in white, I don't beleive it to have been a refinish.
Next came the N4 in Paduak. The dark red/orange wood used on the 3 sides tour and promo. Both the body and neck were of the same wood, and it was only available on sale for a fewyears before the wood's endangered status and/or it's irritant properties or something else entirely forced the withdrawal of this wood as an option
I personally think this is the best version.
I believe the rarest of the N4s is the one made from white korina (body and neck). Just 75 of these were made, each one hand signed and numbered by Mr B, the usual tricks, certificate, numbered photo of Nuno signing it etc... it retailed for about £4000 in the 90's and I've only seen one, ever. These also had gold hardware.
There were also N4's made of mahogany with a maple top, available in both black sunburst and cherry sunburst.
The last wood option that springs to mind is the more recent swamp ash version. again with a maple neck and ebony board. These have been available in natural matt, Paduak stain (when the real paduaks were stopped) and black.
The N8 was a twin neck N4 with 6 and 12 string necks, available only in swamp ash.
For the 10th anniversary, they re-issued the paduak version
The newer NX series utilises the N4 body shape, but loses the reverse headstock. it was available in padauk for a while and also some timeless timber version as well as the regular grey one.
I think that's about it. anyone know anything else thats juicy?