For me it was deciding how much money I wanted to throw at it to 'fix' it. If you have the dollars, spencer or baldwin are excellent alternatives, for a bit more, corbin, the kawi gel seat, and others. If not, the DIY mods work, are cheap, and if you're talented are just as good.
The seat foam can be modifed and the cover stretched back over. Cost can be just a few dollars for some smoothing foam, a memory foam or gel insert, and some monel staples. I couldn't be more pleased with how mine turned out, and it still looks entirely factory done.
2009 V - custom black-on-black - SOLD