1. When these are installed can I still have my bar ends and hand guards attached?
Yes you can. Just make sure to by the version with "open" ends.
2. When the bike is shut off, will this turn the power off to the heated grips? I know that on occassion I will forget to turn the grips off.
If you wire them up correctly, yes they will. This means either using the OEM heated grip connector (tucked WAY up under the radiator) or using a relay when wiring to the battery. (Option 2 is better.) The Oxford controller is designed to automatically shut off if voltage drops below 11.5 volts, but this is supposed to be a safety feature, not the normal way to shut them off. I wouldn't trust it as my sole safety to avoid a dead battery.
3. Are the Oxford grips as good as the Suzuki grips? The Oxford grips are about one thid the price here in Ontario.
The Oxford grips are orders of magnitude BETTER than the Suzuki POS, er... I mean, OEM grips. They will perform better and last longer than the 'Zuke grips for much less money.