some background, i am an electronic musician. i have two powerbooks that i use in the studio and on the stage, but i want to lighten their load so to speak in the studio and maybe get some extra power in the studio as well, i want to do more realtime VST work. I don't use protools so i don't really need the G5. The main programs i run are Bias Peak 4, Reason 2.5, Ableton 3, Cubase SX. So i've been doing some comparisons, checking reviews, xbench's, user experiences, price comparisons , etc. And i've found that for about $1200 US total i can buy a used G4 Cube and install the Powerlogix 1.4ghz G4 7457 upgrade card. If configured correctly with enough Ram, this machine could compete very well (at least in terms of my applications) with a G5 1.6ghz, and for a considerably lower price, and would be 80% more powerful (based on averaged Xbenches) than my 867mhz powerbook. I already have a 120gb 7200rpm HD that i could upgrade into the Cube. So my questions for cube owners or anyone with the knowledge are: 1) Are there any "first you must consider" type problems when performing this upgrade, as it is the largest upgrade CPU available for the Cube. i.e. additional Fan, different power supply, or any additional hardware to keep the upgraded CPU from frying the Cube. 2) Would i need to purchase the different Powerlogix Cube Case? or is that just in the event of also upgrading the video card? 3) As a cube owner, was the upgrade worth it? are you glad you did it? (i'm not asking if its worth it vs. the G5, i have already made that decision.) 4) Was the noise level of the computer considerably increased when upgrading your cube (single processor upgrades)? I think i have exhausted all the research i can do online with exception to getting some real life reviews based on the questions above. anyone's experience would certainly help me in deciding to embark on this project.