I’ve purchased 3 similar HP refurbished units - slightly older Win-7 models like the P6-2113w - that are all great machines. In fact, I’ve never in 30 years purchased a ‘new’ PC - factory refurbished are just a much better deal. Never had any significant issue with one (knock on wood) and sold them used for a good return. I’ve used the AMD on-board graphics with dual monitors and it works quite well - details on HP support site for this model:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c03512749&tmp_task=useCategory&cc=us&dlc=en&lc=en&product=5399024#N82
It’s easy to add wifi or upgrade the graphics with the internal expansion slots - I upgraded one with an nVidia GT-635 card for my son-in-law; very simple and does decent mid-level gaming without any other modifications necessary. However, this is NOT a gaming computer - but I use one as an HTPC and am quite pleased. The digital audio out works great through my AV receiver and a DVI to HDMI cable works perfect with my Panasonic plasma set. Does streaming video, light gaming, browsing, etc. without any issue. There are 4 SATA connectors on the motherboard, but there’s not really any accommodation for expansion drives in the case. It’s still based on the HP Jasmine motherboard, which has been tried and true - very reliable. Complete specs on HP:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c03933829&cc=us&dlc=en&lc=en