Fyi - a pee valve requires the fitting of a condom catheter (sized smaller than you think or are willing to share information on the size you require) and adhesive, hence requiring shaving to avoid more uncomfortable removal. So I would wait until you feel you want to deal with the hassle and added maintenance.
I have a USIA that worked quite well although baggy as I purchased it in a hurry before a big trip. I would recommend custom sizing. I would get another but with a front waist zip - low stress positon and real self donning position. I like thier heavy duty boots and dump valves. I should tryit on again - I may fill it out much more than I used to...I found the fiber insulation suits like weezle did not work as well in this suit as perhaps a more crush resistant insulation layer.
