Get yourself pen & paper, go to Amazon, they have quite a extensive list of lights. Pick out what you want, along with some extension wire, you'll need plenty.
For your flashers, if you don't have the type for leds, you'll get into 'hyperflashing', because not enough resistance is in the circuit to make the flasher flash normally. In THAT case, you'll need ballast resisters, just wire them in and your standard flasher will work just fine. BUT, if your doing this as a total upgrade, go with the electronic flasher, that way no resistance is needed, making your electrical system stronger.
Your alternator will thank you, as it won't have to put out alot of juice got the turn signals and brake lights.
I used the 7" HID LED HEADLIGHTS for motorcycles in my front headlight buckets....they work great and can see the road ALOT BETTER at night. Hell, they are so bright, that during the day, you can see their light on the paint job of cars and road signs.
I consider this a added safety feature, because if folks can see these cars, better, theres less of a chance they'll run over you, plus they look damn cool!