At the other end of the spectrum, because portability (economy too) is what suits my work, I have a Dell Inspiron 11.6" 3000 with 1.5GHz Celeron and 8Gb RAM for 64 bit program and an Acer 8" Win 8 tablet for 32 bit. Even the 8" tab has micro HDMI, so can be plugged into available TVs, and with Bluetooth integrates keyboard and mouse, essentially a desktop that slips into a pocket. My models and drawings max out between 50-100Mb, but that's very unusual, I don't think I've ever modelled anything with more than 10K features. Neither PC raises a sweat for TC, the tablet's fanless, the Dell's fan's hardly heard: it runs for 8 hours on battery, the tablet sleeps and resumes almost instantly, its charge lasts 6-7 hours at least working fulltime and it'll remain on to sleep/resume for more than a week for sporadic work. I gave some thought to an MS Surface Pro or a higher-end Dell Venue 11 pro because both of them have 1080 IPS screens (neither of my devices have IPS, the newer version of my tablet does) and digitizing styli (MS's is Wacom, Dell's is Synaptics. Some reckon that Wacom is the better of the two, but I've never seen a head-to-head, the punditry is apparently opinion and "my GM is better than your Ford" bias), and still might capitulate to the impulse, but they're three-four times the price of each of my current ones, which cost me around $800 for the two. BTW, the tab's Win 8, the notebook 8.1. Both devices are touch interface, and I think Win 8's better for that than Win 7. I haven't put a stopwatch to it, but it seems to me that Win 8's tiled Start kicks off programs faster than double-clicking on the desktop, and faster than the older "all programs" list from the start bar - if the PC's got a lot of programs on that list. The only problem I have with Win 8 is that, if you buy an OEM PC or laptop, Microsoft now encrypts the activation code in the BIOS. If the motherboard dies, Windows is gone. MS refuses to reactivate it, claims that it "can't". If you're buying a component PC, Win 8 System Builder retail OS can be reactivated if the worst happens. Folks, this cautionary tale is true. I know, because it happened to me, and even high-end international negotiation between MS and Samsung in my case didn't resolve it. The retailer refunded, and MS is still facing state and federal consumer-advocacy bureaus here in Australia. That's the most egregious thing that MS has ever tried, IMO.