TL;DR: If you had about £2,000 to spend on PC, monitor, & response box for decent-timing & decent stimulus presentation quality using PsychoPy, what would you buy?
I have approximately £2,000 (about $2,680) to spend on new lab equipment (PC, monitor, & response units). I typically run pretty-standard cognitive experiments, and my primary dependent variable is response time. So, I am pretty keen on making sure (as much as possible) that my timing is good. Stimuli are typically pretty simple (small images or brief text).
Whilst these types of experiments are my bread & butter, I want to future-proof my new purchase as much as possible, so it would be handy if the PC I go for also has the potential to present reasonably hi-tech stimuli (e.g., for visual short-term memory experiments and/or visual psychophysics work).
I am after advice on which PC & monitor setup you would recommend for using with PsychoPy. I have had a look at the PsychoPy website (e.g., http://www.psychopy.org/general/timing/millisecondPrecision.html#can-i-have-my-stimulus-to-appear-with-a-very-precise-rate) on general timing issues in PsychoPy, and looked here (http://psychopy.org/installation.html) for general information about graphics cards (but note that the link to a list of graphics cards that work with PsychoPy is dead: http://upload.psychopy.org/benchmark/report.html).
Basically, if it was your money, what would you buy?