Hey jrok,
You have a very capable radio with the T9CAP & simply only need to get the Spektrum TM-8 2.4 module. If any of the module-based Futaba radios will change from PCM to PPM, you can use the Spektrum module. If your T9 has all the programming functions you need, then why change? I fly with an older JR10X w/both 72Mhz modules & Spektrum DM-9 2.4Ghz modules & never needed another Tx since the 10X has every feature I will ever need for my flying style/parameters. If you feel you may need more features that you radio can deliver, then perhaps, look to a Futaba T10CAP. If you want telemetry, then you will definitely need to upgrade to a more advanced radio, or use an after-market system such as those found on the HK site.
Denny