For temperatures, I'd still have to recomend that you get a reference thermometer, like I did, from Cole-Parmer (or anyone else you see fit). That way, you can calibrate your own instruments.
The one I got had a range of 19C to 27 C, with 0.1 increments. Accurate to one increment, NIST traceable.
The modules look fine. Calibration is going to be what makes your setup a good one.
You can add amp/volt measurement later, which is nice. I probably have a spare 2.5 volt reference IC, good for part of a calibration (when you get there).
As for a PSU, as you know, I got an HP/Agilent unit (pretty old) off eBay, relatively cheap. There might be some lag (voltage drop) as the unit powers up, but it should be rock steady after a 20 minute warm up (I figure). I have yet to test that one too.
How far off are you now from your new year's resolutions?
