As ravi points out, there's no hard and fast rule regarding CD sound vs. LP sound (or transistor sound vs. tube sound for that matter).
Two weekends ago, I listened to a massive (both in size and in budget) system - Accuphase CD player, Art Audio preamp, Plinius power amp (running in pure class A), and Avantgarde Duo horn loudspeakers. The cost of cables alone totalled in the tens of thousands. And guess what? It sounded horrible. It wasn't any fault of the components themselves, but a case of system synergy. Whether your amplification is tube or solid-state is irrelevant, it's the end result - and whether you're satisfied with it or not - that counts.
So listen to an LP in your system. If you like it, then go ahead and purchase a turntable and some vinyl. No harm in that: the more music and the more you enjoy it, the better.
