As much as I love mame, been following it since .3 or .4, nothing will replicate the originals enough for me. Sadly I also do not have the room, others decided to fill my gameroom area with their "storage." But I am coping by building control panels as stand alone devices. So when we want to play a capcom fighter, we just hookup the capcom fighter control panel to my shuttle pc and plug it into the 36 inch tv. It is a FAR strech from a real cab, arcade monitors are simply amazing, but its soul burns on and saves on storage. It also allows me to build custom controls for specific games I want to play, ie Perfect Cherry Blossom or Virtual-On. Eventually I will take pictures of these things.
I vote keep the Gyruss, especially if you enjoy the game alot, sell the mame, build a shuttle pc and some control panels. Or simply an encoder and an arcade vga and temp convert the Gyruss to a vertical mame cab.