We are just now changing from CCS 3.3 to CCS 5.3 due to the upcoming non-support of Windows XP. Our current project is currently building on Windows 7 and CCS 5.3 but it takes 18 minutes where it takes 4 minutes on Windows XP and CCS 3.3.
CGT is v6.1.13. BIOS is 5.41.03.17.
We are using CCS 5.3 because our local rep said that BIOS 5.41.03.17 does not work well with CCS 5.5 which was very true. But CCS 5.3 seems to work well.
We can build and have the MAP file be exactly the same for the CCS 3.3 build and the CCS 5.3 build (except for the data) the only difference is the time to build which will be a big impact on development.