okay...i broke down and bought my first halfstack. used combos ever since ive been playing. from what ive read on the web..line6 is a love or hate situation. some people love the sound of a tube amp best while others get thier rocks off on something like this. what sold me on it was the spider IIIs 400 presets. if u wanna play the song "No More Tears" by Ozzy...put it on that preset and ud swear that u were hearing the album. theres alot of presets of bands im not real familiar. slipknot, lacuna coil, opeth and so on. theres alot of popular settings for songs from ,acdc, whitesnake, zz top, led zepplin, hendrix, ozzy, and metallica to name a few. theres also some settings for songs of an era...50s, 60s, 70s, 80s, 90s, and 00s. theres even presets that members of bands made. not really set to sound like one of thier songs..just presets they came up with. thers one setting called "next room" it actually sounds like its coming from the next room. if ur wanting to get a certain tone as used by a certain band...chances are this amp has it and theres no guess work. of course u can set it how u like if u want ur own tone. as far as the specs on it...150w stereo amp head and 4 12 inch celestions in a cab. i think for 650 bucks u get alot of amp and its useable. i had looked at getting the B52 tube amps but i couldnt get the sound out of it that i wanted on the gain channel. having all of the effects built into the line6 is another factor that weighed in. if ur lookin for a cheap solid state amp that has a lot of cool presets...check out the spider III amps.