From tubes to solid state. What do you loose...

What do you loose? Headaches, hassle and hernia(s). Just kidding. At the top, there's not a lot of difference between the two. At more realistic levels solid state designs tend to do bass better, while tubes typically give a terrific midrange. I, however, have decided to meet in the middle and have gone with hybrid tube equipment. Thus I get some of the best of both worlds while not realizing the best of either.
Trade-offs! I hate those stinkin' trade-offs!

Brauser gives good advice. If you are hassled by a SF amp then you should back away at this point. Do the tube pre with NOS tubes mated to a SS amp and you'll be happy.

You want happy? Sell the SF and get a Supratek Chardonay pre, drop out the stock 6SN7's for VT231's, get a Pass or Plinius MkIII or higher amp and we'll never hear from you again.

I heard Judit's comments before. The explanation is not saying that you are adding harmonics, but rather the results of existing harmonics.

Music!

Brauser "took the words right outta my mouth. It must have been while he was kissin me..." Never mind.
I tried tubes and I really liked them after they broke-in and before they burned out. That was the best fifteen minutes of my life.
There are lots of good tube amps and pre-amps. There are lots of good SS amps and pre-amps. It's all what a person is used to. I have gone to SS and will never change, till later.