Re: jackson js1
If you love the guitar, then new pickups can really make it come alive. However, if you can't justify the price of new pickups, and maybe better wiring, pots, switches and input jack, then save the money and upgrade guitars. It's all about what you like. There are some low priced guitars out there that have a great feel to them, but just lack the optimal set of pickups. Only you can decide.