Reproduction of acoustic instruments with tube amp

Thanks guys. My speakers are Audio Physic Spark III. I'm also considering trying tubes in the bedroom system which has Paradigm Studio 20 v2. I used to own a tube amp (VTL ST-85) and loved what it did for the vocals, but in then end, I went back to my SS (Plinius 100 Mk III). I didn't feel the VTL gave me the definition and separation of the instruments like my SS amps do (the others are McCormack and Coda). I don't mean this to be another "I want the best of both worlds" thread, but since vocals and the sound of acoustic instruments are the two things that I love most, if I could find a tube amp that convinces me with the instruments, I'll at least have my top two 'needs' met.

Sorry Dekay, I didn't answer your questions. I'm looking for a power amp and the room is about 10' x 12'. I use a Resolution Audio CD55 (no pre).

It sounds like I just haven't heard a really good tube amp. I also suspected bad tubes in the VTL (bought used) but didn't want to spend the time/money to find out. I have had similar experience with other tube amps though as well so I guess I just gave up. I guess I'll have to give it another shot and look for a CJ or BAT here on A-gon. Thanks again for the friendly advice. I'll have to do some research to learn a little about tubes and the characteristic sound of each!

I am thinking about tubes again because the vocals with a tube amp are definitely better than any SS I have heard, and the Plinius is pretty good. I didn't say I prefer the midrange of SS, just that most instruments are more convincing to me. I don't think those two things are necessarily the same.

Esoxhntr, I have tried a few different brands of interconnects (Cardas, Audioquest, NBS, Alpha Core?) and settled on HT Pro Silway II. I use AP Oval 9 cables, and Absolute PCs. I'll most-likely keep trying amps until the end of time anyway, but just wanted some opinions from the 'tube experts'. Thanks again.

Zaikesman, thanks for the great advice. This is exactly what I wanted to know.