If a guy were looking to get a good Rifle to keep behind the seat of his old pickup, what would you recomend? (Please don't say an AR-15 or any high dollar rifles... it might be worth more than my truck!) Im just looking for a handy rifle that wont break the budget but could fill many purposes - plinking, self defense, a handy trail gun, ect. Im not opposed to buying used if necessary. The main thing is it must be durable and reliable. Any input would be great!