Never heard of the brands. I'll stick with Targas.
*diorel
Your HU shouldn't have any problem running your Targa. A general rule of mine is that the real "need" for amplifiers starts at speakers costing 4000php and more. The 150W must be its peak wattage. Just look for its nominal RMS wattage. Impossible 150W nominal yan.. ede parang UP6 yun power nyan.. haha..
Save your cash and don't put speakers at the back. If you insist, move your old stocks there. I cannot stress the waste of money on spending cash on rear speakers if you spend 99% of your time at the front. It's like buying decent computer speakers and positioning them at the back rather than the front. It's an unneeded expense.
Since on a budget ka, I can probably guess na Targa din sub mo then V12 yun amp Classic budget car setup.