After much speculation, research and hesitation on whether to hold out for a possible Quad Core iMac I took the plunge a couple of months ago and bought a Dual-Core iMac for 3D modeling and rendering. So you can imagine my disappointment when I heard the news about quad-core i7 iMacs with hyper-threading to take full advantage of the 3D program I use (Autodesk 3DStudio Maxs, for those curious) and if i'm not mistaken with the potential to render up to 4 times faster than my current setup? (Could anyone confirm this since I'm no expert on actual computer hardware.) To rub salt into the wound, new iMacs have a bigger screen with higher resolution for valuable extra space to dock floating palettes To get to the point: What are my chances with apple of trading-up to the new i7 imac? The computer was bought online with the addition of the 3-year apple care. If a trade-up is possible what extra can I expect to pay and any other foreseeable hassles etc. Any advice more than welcome. Thanks.