For the last four years or so, I've had my Hi-Fi and the vast majority of my vinyl collection stored in a self-contained, mildly-customized Ikea unit. Since moving house this has been in my dining room—which we have always referred to as the "play room", since we have a second dining room in which we actually dine.
The intention for the play room was for it to be the room within which all our future children would have their toys kept, in an attempt to keep the living room from being overrun with plastic. The time has thus come for my Hi-Fi to come out of there, so we've moved it to our living room. Unfortunately, there's not enough room in the living room for the Ikea unit: I need something narrower for the space available.
In the spirit of my original hack, I started looking at what others might have achieved with Ikea components. There are some great examples of open-style units built out of the (extremely cheap) Lack coffee tables, such as this ikeahackers article, but I'd prefer something more enclosed. One problem I've had with the Expedit unit was my cat trying to scratch the records. I ended up putting framed records at the front to cover the spines of the records within. If I were keeping the unit, I'd look at fitting hinges (another ikeahackers article)
Asides from hacked Ikea stuff, there are a few companies offering traditional enclosed Hi Fi cabinets. I'm going to struggle to fit both the equipment and a subset of records into these, so I might have to look at storing them separately. In some ways that makes life easier: the records could go into a 1x4 Ikea KALLAX unit, leaving the amp and deck to home somewhere. Perhaps I could look at a bigger unit for under the TV.
My parents have a nice Hi-Fi unit that pretends to be a chest of drawers. I'm fairly sure my Dad custom-built it, as it has a hinged top to provide access to the turntable and I haven't seen anything like that on the market.
That brings me onto thinking about other AV things I'd like to achieve in the living room. I've always been interested in exploring surround sound, but my initial attempt in my prior flat did not go well, either because the room was not terribly suited accoustically, or because the Pioneer unit I bought was rubbish, or both. It seems that there aren't really AV receivers which are designed to satisfy both people wanting to use them in a Hi-Fi and a home cinema setting. I could stick to stereo and run the TV into my existing (or a new) amplifier, subject to some logistics around wiring. A previous house owner ran some phono cables under the hard-wood flooring from the TV alcove to the opposite side of the fire place, which might give me some options.
There's also the world of wireless audio, Sonos etcetera. Realistically the majority of my music is digital nowadays, and it would be good to be able to listen to it conveniently in the house. I've heard good reports on the entry level Sonos stuff, but they seem to be Mono, and even the more high-end ones with lots of drivers have very small separation. I did buy a Chromecast Audio on a whim recently, but I haven't looked at it much yet: perhaps that's part of the solution.
So, lots of stuff in the melting pot to figure out here!