i'm definitely no expert by any means. you can get usable tones from one of those amps if you know what you are doing, check out the Ola Englund vid. but remember this guy is known for making awesome tones with anything, so don't expect results like this without a lot of knowledge.
If you are using a DAW, look into getting some VST's - like the lepou plugins, nick crow stuff or TSE50x. you'll need to read up on IR's too if you haven'r come across them before.
and by the sounds of it 3 distortion pedals is WAAAAAY too much. probably why you aren't getting any colour, just noise. try using a just an overdrive pedal (is that BBE screamer an overdrive?) if so, put the volume to max, gain to about 5-10% and don't go crazy with the amps gain either.
but i do think VST's are the answer for you. if you already have a DAW they are free
, and will give you probably the best tones without buying something like an eleven rack or axe fx (which can be pretty pricey).
[VIDEO]http://www.youtube.com/watch?v=be9oMgWXC3g]Marshall MG15 - Metal - YouTube[/VIDEO]