Just wanted some of your oppinions on Power inverters with InDash Tv setup's...

I will be running a Sony XTL- W7000 7" Indash TFT Screen and i am planning on hooking up my xbox to it. (placed under the passenger seat).
Im told i need to obviously buy a power inverter...

As advised, a 300Watt inverter is plenty to power the Xbox..

Now here's were my main question lies.

a) Im told some inverter's can generate "Noise" and the picture is not the best. I will be most probably getting this jaycar model : http://www.jaycar.com.au/productView...Max=&SUBCATID=

Does anyone have any feedback on this model? I know Jaycar are generally decent quality...

b) Am i able to leave the inverter powered on all the time ( it will be hardwired to the battery) and just turn the xbox on whenever i need to use it e.t.c ? Or will this cause my battery to go flat ?

Has anyone run this setup? Your input would be great !

Thanks