I have been trying to understand rack effects and their setup etc after reading a suggestion by ronnieanand in a thread. The audio samples on TC Electronics and Tech21's site just blew me away. IMO these things put GNX/COSM/REMS/Whatever to shame. Assuming I primarily need 2 things. 1) Sound colouring (Dist/OD etc) and/or Amp Simulation 2) Modulation Also assume I decided on the following 1) Tech21 SansAmp GT2 for OD+Amp Sim 2) TC Electronics G-Major for Modulation So my setup would be guitar>GT2->G-Major->Amp Do I need a power amp?? Is a guitar/bass amp still required or justa cabinet would do? Will a keyboard amp/pa sound better in this setup??