The Quadra 700 isn't a bad choice if you add an accelerator card. It's the same size as the IIcx/IIci and has the benefit of being able to be used as a minitower or as a desktop (depending on how much space you have this is something that should be considered). I'm not sure if its 25MHz (full) 040 can be swapped or overclocked but this is definitely a computer worth looking at for the sake of its size and practicality in terms of convertability between desktop and minitower.