Head-unit

Since I got a sound system in my car I have put in a new head-unit. Although now that I have researched more I want to change my head-unit to one with a screen. Do you think a new head-unit is really necessary? And what more do I get out of a head-unit with a screen rather than just a regualr one? here is a link to the head-unit I was looking at http://www.walmart.com/catalog/product.do?product_id=10233152

Neon

I just recently bought some interior neon for my car the only problem is they aren't as bright as I'd like them to be and I can't find a good way to hide the cords. These neons are not hardwire ones, they just plug into the cigarette lighter. Does anyone know where I can purchase some brighter interior neon sticks and how I can hide my cords without having to hardwire them?

lowering

I have been talking to a bunch of people about getting a front lip or lowering my car. Half the people I spoke to said to just lower it. However, the other half said get a front lip. Is it more expensive to lower my car or just buy a front lip kit? 

Amp

I was thinking about adding another amp to my sound system. My car has decent bass now I would just like a little bit more. I am running a jl audio 6450 6 channel amp and am thinking about adding a mono-block to it. Do you think this will be too many watts for my subs?(two 10 inch subs.) Or let me know of any other alternatives there are for adding more bass.

Calipers

Ok so I want to add something to my car that will make it look better in appearance. I was looking at painting my calipers red. I say this because with black rims and a black car, red calipers flow nicely and makes a bold visual statement. I'm just currious of how much this will cost me I heard it can get pricey because it is a special heat resistant paint that is used. Please let me know if you think this is a good accessory to add or how much the paint will cost?

Ticking noise

My friend went to get in his car and tried to turn it on and it wouldn't start, it just made this weird ticking noise. I suggested to him that his battery might be dead and he might need a new one. I'm not totally sure about this, but I told him I'd ask around and see if anyone knew what it could be. So please write back if you have any information as to why this could have happened.

Mirror Problem

Ok so I just got in my car and went to adjust the mirror and it didn't move. Does anyone know where the fuse is for the mirror or an answer to why this problem would have occurred so randomly? Also, does anyone know how much it would cost to get something like this fixed if I can't fix it manually?