The 706mk2 does very good in the Output Power area. If yours is
slightly off, you can look here to see what can be done.Mine does 100-110 PEP without a problem.
The 5 MHZ and MARS Mod
You can get these at Harbor Freight very cheap
They make doing stuff like this very easy.
This will give you the new 5Mhz Band, plus take care of any of your HF or UHF Mars Needs