i was thinking of changing my front speakers in my mazda 3 but i don't know if i should go with a component set or just throw in some infinity 6x8's. I want a component set that has good mids good mid range bass and is pretty decent. I am trying to go cheap as possible so 100$ is my max i don't mind buying old models since i will be searching on ebay.
your gonna need an amp for those....can you budget for that? 100-150x2 is about what you'll need. if you're just looking to take out the stock speakers and put those in....running off the factory HU....don't expect very much from it.
you can fit 6.5 in a 6x8 hole easy no trimming iv done it in several different cars. if you use MDF as a baffle use 1/2 or 3/4 if you got it laying around it depends on your door pannel but it will pace the speaker out enough and fit fine.