Having just investigated whether to go for a TV or dual monitors I would recommend you buy a monitor.
All the TV's I looked at require HDMI input and if your graphics card / motherboard does not have this then they are a no go.
Picture quality is also worse then a monitor unless you go for a 4k TV which then creates another issue - the TV's are too big and close for comfortable viewing.
I finally bought a pair of 23" monitors ( I work dual screen for Movie Edit Pro) - dual screen is not necessary for Music Maker.
Do make sure that the monitors have VGA, DVI and HDMI inputs - this will future proof you.