I have been doing some WOM on location portrait photography on the side of my main career. I currently shoot with a nikon d7000. I'm never quite thrilled with the results of my pictures in terms of sharpness. Everything seems so soft, not crisp with fine detail. The lenses I have that are not kit lenses are Nikon: 35mm dx afs 1.8g, AF-S 50mm f/1.4G SIC SW Prime and 85mm f/1.8D AF. My flash when needed is the sb-600. I spend a great deal of time blaming the performance of my camera for the lack of quality in my images and keep debating the upgrade to the d800. My funds are low as this is a very part time thing, my prices are low and I'm raising a family. If I were to make an upgrade I would be financing it. I'm not sure if this is worth it but I feel in a rutt and need the confidence in my work to keep going forward and I feel that I don't have that with my current equipment. Any advice on the best way to proceed would be much appreciated.