it might be a good idea to get rid of a lot of stuff (both software & hardware) as I think it could hinder your learning... I remeber when i was just starting out I just had 1 machine for ages (MC-303) then I added a Alpha Juno 1 year later.... then something else 6 months later... took a long time to build things up but I learnt things really well that way... also software overload is a big killer for a lot of people.... "all the software u can get" would stop me stone dead in my tracks....

youve got loads of sequencers on that list as well.... which one do you find easiest to use? Id just stick to one for now to be honest...

basically id

1) clear the harddrive completley

2) install 1 sequencer & audio editor like Soundforge

3) pick a favourite soft synth that you have got and JUST use that one (learn it inside and out)

4) Install one drum sample player like Battery (or whatever)

5) install a handfull of FX plugs (or maybe just use the built in SX ones)

5) Sort through your sample collection & weed out all the crap... sort the rest into folder for easy access (this took me 2 full days but was worth it)

SELL

1 of the 303's

Either the Virus or Supernova

Maybe the Alpha Juno

Some of outboard if your not using it

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I think the more streamlined / simple you make it the easier it will be for you to learn / have fun.