My entire set up is new except for my TV. I have a 7 year old panasonic plasma. I pulled the old HTiB out of the box to set up in our new house, but alas, it was waaaaay too deep to fit in custom bookshelves in our living room. So off to best buy thinking I would grab an all in one amp/blu ray and just hook up to my JBL HTiB satellites. No can do. So I snagged their cheapest AVR, a Yamaha RXV-375. Only to discover my passive sub would no longer work as modern AVR's don't power the subs. So grabbed a Polk PSW110. Also needed a blu ray player so picked up a Sony BDP-S5100. Then I started browsing audio websites and figured I needed better speakers, so ended up getting HSU bookshelves and center, which were a huge upgrade over the JBL satellites. Then the sub seemed outclassed, so I researched that. I demo'd a SVS PB2000, but have sent it back, and am scheduled to receive a PSA XS30 in a few days. Also added an Apple TV and a Harmony 650 remote.
That's it for now. Overall, it has been an eye opening experience. I went from a cheap HTiB to what I believe is an extremely capable system with a reasonable investment of not much over $2k for everything. I think I would have to spend much much more to get a marginal increase in performance, so I am very happy with what I have. Future upgrades planned are:
1) Surround speakers. Looking at fluance as the price is very good, quality seems ok(just surrounds), and I like their bipole design. This will be a cheap addition that will make a big difference.
2) Running the Polk near field to smooth out bass, but its really way outclasses by the XS30, so will probably add a better sub later this year for this purpose. I cant fit a match to the XS30, so maybe its little brother the XS15, or maybe even the HSU VTF1 or VTF2 as these would fit better.
3) AVR upgrade, perhaps a Denon X4000 in order to get more power, Audysey XT 32, and sub eq.
4) Those 70" LED's are looking mighty temping.
Most of these other than the surrounds are probably 6 months to a year out.