Let me confuse you for just a second. ATI won't have 2300 anymore. The entry level RV610 based chip is going to be named Radeon HD 2400. It will come in two flavours one called PRO, the slower one and the faster one called XT.
These cards will probably resurface at Computex as ATI had to delay them again. The HD name is now confirmed from a several sources. Good thinking ATI.