So, what, in your opinion, I should be looking for is a speaker that is a "neutral" as I can? I shouldnt really concern myself with how it sounds in the audition?
1st, my opinion really is not the issue here - my suggestions in this thread as based on the credible perceptual research into the field of human hearing vs. measured parameters.
As for what to look for in way of 3rd party credible measurements: a smooth on axis frequency response, with no more than 1.5dB deviation from a flat line, and that 1.5dB variation should be for very small/short sections - not extended areas. The off axis response sets, in increments of 15 degrees, should be a close representation of the on axis up to 30 degrees, up to 15khz. The off axis sets up to 60 degrees, should be an accurate representation of the on axis up to 6-8khz, with a smooth high frequency drop off after 6-8khz. If overall response at far angles is even more similar across a wider band, than this is a good thing. The previous limits are given as a baseline of that is expected of a typical good response speaker. The waterfall plot, if one is given, should have a quick decay with no wide ridges of energy as referenced at the first -25dB down from the test signal. Distortion, if provided, should be at least in the general range of 40dB down from the main signal, when the speaker is used at 90db at 1.5-2 Meters. Distortion harmonics should not be present in higher multiple orders(if this data is given), that is, the distortion harmonics should be close to the fundamental tones used to measure each distortion point - not far away, such as present in the 10th order/multiple. Cabinet resonance, if measured, should be low in comparison to the average speaker system. Stereophile provides a center wall vibration measurement for each speaker they measure. You have to account for the enclosure over-all size and the speaker sensitivity because Stereophile does not account for these things in the graphs - as such, two graphs may not necessarily be comparable - you have to check the conditions.
These are some basic things to look for when searching for a monopolar speaker system. Monopolar is not ideal for stereo sound reproduction, but it is the easiest and most common type of speaker to use.
Be aware that you do have to have some understanding of the founding perceptual research in order to be able to determine things form measured data - even if that data is provided in sufficient amounts.
-Chris