Dark Side still blows my mind every time I listen to it. Greatest single album I've ever heard. Concept or progressive or not. They reached, in my mind, an almost unmatched level of musicianship on that record. It's wonderfully depressing, lol. The low quiet moments... the frantic high moments... And I would say two of my favorite guitar solos, but hell I'll just say it... my two favorite guitar solos of all time are on that record... Time and Money. Gilmour is amazing.
Hell, I still wear my t-shirt all the time, lol.