What's your objective? If it's high fidelity you'll avoid tubes. If it's "sound you like" you may or may not want tubes.I'm not against or for tubes. Everything under the sun as they say. I have even been looking at some Conrad Johnson pre's. I just want to do enough due diligence to give myself a good chance at doing something right with my hard earned money that I won't just plain regret..
In the latter case it's impossible to predict whether a particular purchase will be "the right thing" because it's based on nonobjective factors.