The top model is the 5.9 (1139)... capable of resolutions of 1680x1050... i think this is one below the top model. Just a small clarification... good luck with the sale.
PowerBook 5,8 and 5,9 is the same *generation* though, both released in October 2005, and they are pretty much the same computer. The main difference is the 15" screen (1440x960) of the 5,8 and the 17" screen (1680x1050) of the 5,9. Otherwise they are pretty much the same, for example they both have 1.67GHz G4 (was there a 1.5 version of the 15" as well?), ATI Mobility Radeon 9700 (4X AGP) graphics with 128 MB of VMEM, "Dual Layer SuperDrive", etc. So it's mostly down to what size of the computer you prefer.
The generation before this, the PowerBook 5,6 and 5,7, was released in January 2005. The 5,6 is the 15" (1280x854) and the 5,7 is the 17" (1440x900). But in this generation there is a *difference* in VMEM, the 15" model only having 64 MB while the 17" having 128 MB. There was also a lower end version of the PowerBook 5,6 / 15" model, having a 1.5 GHz G4 instead of 1.67 GHz, and a "Combo Drive" instead of "Super Drive".
These are the models (5,6 - 5,9) that will be supported by MorphOS 3.0 AFAIK. I'm thinking of a 5,8 myself, having just seen a local ad where it will be sold for about €150. Very tempting!
