#3
great deal dude if you want a good clean tone it may not be your amp the rythm channel has a sorta clean tone but its not good
#4
Get a Chorus pedal to improve the cleans or do some modding. I've heard soundclips of modded 5150's and trust me, the mods improves the 5150 leaps and bounds.
2005 Epiphone Les Paul Custom
Marshall JCM900 MKIII Master Volume head
Carvin G412T cabinet
Line 6 DL-4
Boss BF-3
Boss CS-3
Boss NS-2
Boss OD-20
Boss PH-2
Ibanez TS-7 (being modded soon!)