well coilovers arent much more than just getting lowered springs done with shocks, and very easy to do yourself. without lowering it will look gayer than aids, so thats something you need to take into consideration. and you will need to get it aligned then anyways, so throw them in, put em at the height you want then get them aligned.
as for the camber arms and issues, not sure man, you might just be right with the smaller tires, suspension does roll in to negative camber naturally as you lower it.but coilovers or lowered springs is a must (coilovers for adjustability whould be the best way to go.)