Well, just look at Blood 2. Could've been a great game, if Monolith hadn't rushed it, hadn't scrapped the magic system, and had spent enough time in beta and QA to balance the weapons and work out all of the bugs. So yeah, more beta = fewer bugs = better game.
As for computers, my family has five: One old G4 upstairs, one old G4 that my mom uses for work, a Quicksilver G4 that my dad uses in his recording studio, a TiBook, and my gaming PC that I built (Athlon X2 4600+, GeForce 7800GTX). We're probably going to get another (MacBook Pro?), so my parents can have a Windows-compatible (i.e. BootCamp/Parallels) machine when I take my PC to college in August.
I know this is unrelated, but I for one would most definitely like to see some kind of mod system and level editor, a la Escape Velocity or Unreal Tournament (two of the most well-designed mod systems ever). User-generated content gives a product, especially an indie one with a dedicated fan base, a huge boost and major replay value. Darwinia, Uplink, the Escape Velocity series, and the Unreal series are prime examples of this.