In most situations, what you need from an amp is the following:

• One good clean tone
• One good Dino crunch tone
• One good lead tone

You can achieve this by a two or three channel tube amp OR in the most basic way, a one channel tube amp and your guitar's volume knob (for clean) and a overdrive or distortion pedal (for lead)
 
 What you probably don’t need:

• Many mediocre sounds
• Versatility. Amp versatility is overrated in most situations

Why you want a tube amp

• Does one thing VERY well
• Best tone
• Live performance

   
Why you might want a solid state amp

• Practice amp
• Certain recording uses

       
Remember: Design concept is more important than brand. When trying to cop your favorite player's tone, matching the amp's power tube type gets you closer than anything else.