I have a MTM tailor that has a ton of fabric in Super 170s and 180s. I'm a bit concerned about the durability of the fabric, given my review of posters' comments in prior threads. Can someone please advise as to whether there is any correlation between a higher count and the thickness of the fabric? For instance, is it possible to find a durable, year-round fabric in the Super 170s range? Or, should I drop down to a lower price point and go with a lower count?