I m going to be running 2 alpine SWR-1242D type R's off the alpine MDR-M1005 with 2 Infinity 6x9 and 2 infinty 5-1/4 component's off the alpine MRV-F345 in a sunfire, i was wondering if i need to get a power cap for my system or will the stock alt handel the power and also if this would be a good set up for my car.