Wah....so many ppl now wan to mod their fish.... 
Filter: Any brand all good but dun last the same...ori paper sucks
big time...
Window tint: Any brand also good, why pay more for jus simple
tint...
spend on other perfomance mod....
Voltage Stabilizer: Any brand also good only price
difference...good for audio sound enthusiast, DVD in-car player,
ignition and in-car lightings...
No need to worry n think so much...jus do it. 
Some things r cheaper here than JB... Volt stabilizer n
filter(K&N) r much cheaper here...eg. for window tint,
servicing, labour charges, Audio systems,DVDs , Bodykits, exhaust
system and tyres/rims r cheaper in JB.