I'm looking to upgrade my HT. I have a receiver and 2 front speakers. What's the next thing to get? (Sub / Center / etc)? I listen to about 50% music / 50% movies. But, i live in an apt... so that is a consideration for the sub.
It may or it may not. Really depends on your media and equipment. If the media is recorded in stereo, a center channel will not necessarily tighten it up. But for movies that are in 5.1, it may.
The best thing is to go to a place that has a complete set-up and listen for yourself using the media you have. Try different configurations and see if it does anything for you.
You will need a center, surrounds, and a sub. It does not matter what order you buy them. 2 speakers and a sub or 2 fronts 2 surrounds or 3 fronts, all these choices are good as long as you plan on eventually getting them all.