Hobson's Choice to upgrade or buy new
Advanced amateur, computers since 1983. If you can afford it, a new computer about every 3 years (approx.) will keep you somewhat up to date. I've tried simply updating components, but I always run into some new wrinkle that something conflicts or won't work, or requires a new version of at least one app. At times, the OS takes a big step forward (e.g., Windows Me to XP, XP to Vista or 7), and some technical expertise is more than useful. I know folks who can upgrade successfully, but not me. However, since you have XP, you should consider pro help to upgrade at least to 7, a much better OS. And with Windows 8 coming this Fall, your old XP might well have some difficulties quickly. Win7 has compatibility mode, which I've found works with over 80% of mainstream XP programs. That may or may not continue with 8. But since XP is no longer supported (except for business, last I read), a good new buy will likely set you up for another 4-5 years with lots less hassle. I found my i7-920 was a (desktop) major step up, and recently (laptop) an i7-2670 cut my laptop times by half. Sandy Bridge (2nd Generation i-series) was a big leap forward, Ivy Bridge initially appears to be just as bit. So from my experience (and IT people I know), if you need an upgrade now (old unit is having issues, you need newer software, etc.), get a 2nd Gen i-series (even the i3 beats a Pentium or dual core 20 ways to Sunday) Sandy Bridge with at least 6 Gb of DDR3 (1333 preferred) RAM, a good mix of value and power. You'll note I'm not a big AMD fan, though their CPUs do an excellent job too, for less cost. I just prefer Intel. If your computer seems to be doing ok, and software is adequate, you might want to save up for one of the new units supposed to start being available in March or April, and that run Win7, but can also run Win8 when it comes out this Fall. That gives you value AND options on further upgrades or "hold 'em" for a few more years. Remember, though, upgrading to even Win7 will likely give you good reason to buy some newer software (freeware, Office, antivirus, photo or other apps). So when deciding what to buy, check out the cost of updated software that will benefit your upgrade or update. My son is in IT and helps when he can, so I have a slight advantage. I recommend setting up a realistic budget, a small "reserve" in case you guess wrong, and then find what will fit the budget. I've bought "refurbished" from Dell and HP, and had no problems with them (read the fine print!). Year-end deals can also help you find something a bit better for less money. My son's HP laptop (dv6t) cost $1300 customized with near-high-end components. I just bought the same laptop with two major components one step down (720p instead of 1080p, 5400 rpm hard drive rather than 7200) because my needs aren't as powerful. I save $400, still got blu-ray, 750 hard drive, i7-2760, some other neat bits, and still can afford to add my usual software (from the 3-license software that many providers sell for a few dollars more). Do your "homework" (yeah, I hate that word too, but it's really helpful). Good luck! cheyguy