Using DAVE 4 APP project with IAR EWARM

I'm using an XMC1404-0200 with DAVE 4 and several DAVE APPs. I need to use IAR instead of gcc as the build tools.
Is it best to use IAR to import the config.xml file and just develop and test in the IAR EW or should I change the build tools in Eclipse to the IAR compiler, assembler and linker and continue to develop and test in Eclipse?