I'd go for (In order)

 Roland Cube series amp- Best value for the money and great small amps and awesome variety

 Vox- A little pricey but great EQ's and effects and solid tones

 Carvin- A little more expensive than the Vox, but better quality and the best clean tones for the money as well as solid distortion, though you only get get standard EQ's and effects are nothing great

 Fender- Classic tones, solid cleans and good EQ, but poor distortion for anything heavier

 Orange- Great cleans and good EQ but very pricey and cheesy distortion

 Marshall- Good beginner amp, easy to use and find an adequate enough tones plus decent effects and EQ. Cleans are nothing great and distortions are generic sounding and the amps are over priced

 Line Six- Usually cheaper, great effects variety and a decent EQ,
NOT FOR BEGINNERS, difficult to find a good tone, poor wiring - consider packaging this amp with a compressor or noise suppressor.
Hope that helps!
Rock on!