Pedestals always look classy, but on large vessels I understand people's concerns about only attaching along the keel, especially if it is plastic! The builders' decorative models of the 20th century usually used a four-point attachment; i.e fore, aft and two close to the turn of the bilges either side amidships. Here's an example http://www.nmm.ac.uk/collections/displayRepro.cfm?reproID=F7804-002#content (I purposely tried to pick a 20th century model)
On a flat-bottomed hull you could use this method utilising propriety pedestals of same height without problems, but anything with a fair bit of deadrise would probably require you turning them yourself!
Builder's often used the chock method of mounting on hull-only cdesign study models. This wasn't usually to scale- as can be seen here on an architects model of the famous clipper Thermopylae http://www.aberdeenships.com/image.asp?Id=13563&Size=Full
A century earlier it was somehwat more common to build models of the slip and launching cradle to the scale of the vessel. I don't know enough about the subject, but safely launching a vessel was very difficult in this period and I imagine a lot of attention was paid by the builders to showing how this was proposed to be done! HMS Bellona was certainly an unusually fine example of this type of model used as a demostration model. Ostensibly to show how copper plating could be applied, it would not suprise me that her detailed launch cradle was represented for the same reasons (several British battleships had been ruined by poor launching techniques round this date) http://www.nmm.ac.uk/collections/nelson/viewObject.cfm?ID=SLR0338 These pictures don't show that the wooden case has a small drawer at one end that allows a launching slip to extend for same distance astern the vessel again. I have spent almost 1/2 hour just staring in awe at this model at Greenwich.
Anyhow- I suppose what I am saying is that the choice of particular mounting can go a long way to setting the 'tone' for the model. Aforementioned brass pedestals on hardwood bases recall the 19th century builder's model, wooden chocks recall Admiralty models. I like my models, even the plastic ones, to somehow recall the age from which they came (I mainly model sailing vessels of 18-19th century)
For an obviously 'high tech' model built from a 21st century plastic kit, bristling in p/e, I'd personally be quite keen on experimenting with something more modern- arcylic pedestals, or maybe brushed metal of one type or another.
Will