Hello! As you can see this is my first time here. From the looks of the threads I have been looking over, this will hopefully be my new audio forum home. I used to frequent audioforums.com, but after a few months break, I returned to find the forums almost empty! anyways... I have been using Sonar 3 Producers Edition for awhile now and am very pleased with it. What I am wondering, is there any reason I should upgrade to Sonar 4? Is the audio engine better? Will it dither better? Is it better at SRC?? Here is my setup: AMD Athlon XP 3000+ 1 GB PC2700 RAM Echo Layla24 M-Audio Revolution 7.1 Windows XP PRO I have just basic mics (SM-57's & 58's) and a $100 Behringer Tube Mic Pre and a $100 Behringer compressor I play and record rock and acoustic guitar mainly. Thanks for any input!!