We have 3 prams, 1 travel pram (which always stays in the car), 1 single child pram and 1 double pram.
Only the single child pram was bought secondhand though because it was an expensive model brand new. There are lots of optional accessories for them available at the baby stores but most aren't necessary anyway. Make sure that it will definitely fit into your car easily (something i should have been more careful about) and that it also is easy to fold as well. This can't be stressed highly enough! In the shop it may seem not so difficult but try doing it under pressure and see how you go. Also it shouldn't weigh a tonne either, i have seen a few makes that weigh well over 20kgs without any accessories or other junk in them.
If you plan on walking with the pram alot, i recommend getting a model with pump up tyres. There are lots of models with hard rubber wheels and such but i reckon the baby sleeps better when the tyres are softer and don't make so much noise. Plus here in winter the bigger tyres get through the snow much more easily, however i doubt any of you guys will have that same problem!
Don't let your wives go crazy buying clothes either, mine did and i wish i had hidden her wallet at some point. Baby clothes don't last very long at all and even though they might look really really cute, chances are that they might only get used once or twice anyway. We have a few boxes full of hardly used stuff to attest to this.
BTW, this thread is really kicking along, i like it alot!