On a trip to Louisiana and Mississippi planned for the month of August, I plan to shoot both color and black and white images (35mm and 2 1/4 in E100G and E100VS; 35 mm in Tri-X and Delta 3200, and PanF Plus in 2 1/4). However, having recently perused the Leica website, I am intrigued by the infrared thread, and have considered adding shooting some black and white infrared film to my efforts. Given that Kodak discontinued its offering sometime back, what are my options? It is my understanding that Ilford's offering - SFX - is not a true infrared film? If this is so, how does the film differ from conventional infrared? Are there still films available that are considered true infrared? Any recommendations? I am interested in shooting only in 2 1/4 if that bears on recommendations.