I have a bit of Pearl Izumi stuff and I agree with you about the low end chamois- they were either far too thin or really bulky. However the high end stuff is great.
I love their headband with ponytail hole for winter. Mine has lasted for years and doesn't show any signs of wearing out.
I also have the droptail cycling suit tights. They are only the Thermafleece ones (2nd from the top) and have the Elite 3D (orange) chamois. Chamois is perfect- dense enough and not bulky, the fabric is tough wearing but really only OK down to temperatures of 5 degrees C.
Size wise I find them great and very true to size with a lot of give in the larger sizes.
Their Elite level shorts are great for hot, humid weather. Nice and thin and soft (not like the sliughtly scratchy panels of the Sugoi RS shorts) and wick really well. They also have the same chamois as my cycling suit tights which is a total bonus.
I also have a pair of their gloves which I really love- the Gel Vent. They have a solid flexi gel pieces on the palms with holes in them covered by mesh. The velcro fastens under the wrist and the glove is cut so it doesn't get in the way of your watch. I find they are really flexi but with enough padding to really absorb the bumps. I haven't had any numb finger issues wearing these gloves.
I also have the Elite Barrier Convertible jacket/vest. Fabric wise it is only water repellent and cannot withstand a total soaking shower but it is very versitile being able to turn into a vest. I notice they improved the design by making the sleeves that zip off one piece which is good. I now only use this as a vest as somehow I managed to lose a sleeve when the design was seperate sleeves! Nice and warm and does block the wind.