Of course it's possible to buy something better for less - it's also possible to buy something worse for less too!
If you want to explore alternatives, then the key is to keep what you have, and to get something else as well. There are so many different great approaches to producing enjoyable sound, the trick is really to step away from chasing accuracy, and to choose other aesthetics. The fact you have a Gyrodec suggests you have already made decisions based on looks rather than just sticking with the orthodoxy.
So, my advice would be to choose something that you would enjoy alongside what you have already. Since you have vinyl, how about an idler deck? Go and track down a nice Garrard, and build a period correct 1960s stereo with it. Or maybe something more modern - try statement Japanese stuff from the 70s.
By keeping both systems alive, you can A/B which is most of the pleasure, and it'll help you realise the strengths and weaknesses of what you have (and there will be both of course).
I agree with Cesare. Try dipping your toe in the water using a second system. Invest much less and use the second hand market so that you don't lose too much if you sell it on. Maybe you could get a feel for whatever suggestion you like the sound of without fully committing yourself and regretting the sale of a system your already enjoy.
Funny you should say that as I am renovating my new home while living in my old one. My main system is at my old place, but about a year ago I wanted something for the new place to use while I was doing it up (it's several projects in one so it's not sitting amongst rubble or the likes). I was stuck as I realised I just don't know much about other brands so I ended up with a Naim CD5XS/Naim 5Si/Linn Ninkas which sounds pretty good... this will eventually swap with my main system as we are keeping our old place for occasional use, but I was thinking I could experiment a bit more with this system in the future.