GNS-5xx OR Radio-Plus-Autopilot

I am considering the following:

A set of Saitek, Radio-Panel-PZ69 and Multi-Panel-PZ70 for $304,

OR

VRInsight GPS-5 for $400, or

EmuTeq GarSim GNS-530 for £465

Is there enough overlap in features / functionality that I can get just a GNS-5xx

or would I still need to get a radio and autopilot?

I anticipate using them for hopping to the next VOR beacon and to the next airport,

and autopilot to hold bearing and altitude while I look around and figure out where to go next.

Would I promptly outgrow just a GNS-5xx and want a radio to talk to people (like VATSIM)?

Thanks in advance,

JD