Photography has always been a love of mine since I was a child; but I was never really serious about it. Now I want to really explore photography more and find my "voice", so I am starting a "Project 365" to help me figure that out. After working quite of bit of overtime this year, I now have $1,000 - 1,500 to spend on anything I want. Right now, I have the following equipment: Canon Rebel XTi battery grip and remote Canon EF 50mm f/1.8 Canon EF 28-135mm IS f/3.5-5.6 Canon EF 100-300mm f/4.5-5.6 ProMaster 7500DX flash (which I really don't like!) a cheap tripod from Wal-Mart What are your recommendations for equipment and accesories (big or small) for expanding/improving my kit?