Perhaps I'm too cynical but when folks say a SS piece 'sounds like tubes' I assume that it has a dark tone, is closed in, and in fact sounds nothing like tubes.
Conversely, when someone sez that a tube piece sounds like SS it is unduly emphasizing the upper-mid range and highs to maximize its stereo imaging capabilities, and if fact sounds nothing like SS.
I'll spare you my opinion of what tubes sound like.......:-)But if you really want to hear tubes you've got to buy them. There's no free lunch.