Comm/Transponder/GPS

[XBDT]

Hi to all,

I need some avionics in my chopper, any suggestions for other devices?
I would like to buy:

-Garmin Apollo SL40 VHF Comm
-Garmin GTX 327 transponder (or do I better buy a mode S ?)
-Bendix/king Skymap IIIC

thanks for your suggesions and replies

Xavier