As for searching cents just for the copper, it doesn't sound like a whole lot of fun... but if you have the space to store it all, it probably makes sense to do. I'd go out on a limb and say that copper has a pretty good chance of outperforming silver and gold over the long haul. There are 7+ billion people on the planet (and growing), and a decent percentage of them will see enormously rapid increases in their living standards regardless of what happens to the global financial and economic system. Copper consumption is far more directly tied to their development than precious metals, as it an essential material for increased living standards. For most of the people on this planet, gold and silver are not directly tied to actual living standards the way copper is.
Although I'm currently living overseas and not doing any CRHing or MDing, I believe that searching cents for wheaties, WAMs, CUDs, and other goodies provides the best return-on-time-and-money-invested of all the coin denominations (nickels being second). In addition to wheats and a few Indians, last year I found three 1999 WAMs, a combined total of about forty 1998 / 2000 WAMs, an amazing CUD that I sold on Ebay for over $100, and a majestic die cap that also sold for north of $100. Also, in contrast to when I did halves in a big way, searching cents removes the worry about possibly getting stuck holding thousands of $$ in coin if dumping becomes an issue. It is just more fun and care-free.
Just my opinion... worth every cent you paid for it! :-)
Happy Hunting!