PSA blemished dude.. Take the money you saved and put it towards a good barrel and trigger.
Of the 30 or so lowers I've assembled, I have seen no difference in overall functionality between a PSA blem lower (my favorite), and anderson lower (second favorite), to RRA, BCM, Noveske, and one or two billet lowers put together. Finish may vary from manufacturer to manufacturer, but specs are all pretty much the same. I have seen even higher end builds have play between the assembled upper and lower. Doesn't affect accuracy or functionality.
Also, I'm not a huge fan of spikes lowers - the two that I have built up did not drop free with pmags. Purchased those about 2 years ago, don't have any experience with recent production runs.