Onus :
pauldh :
Well, i3 is probably the best choice for gamers on a budget who do not overclock. FX-4's are capable, but you will typically need to hit high clocks to match the brute force of i3. And high clocks also means a beefed up cooler, mobo, and PSU expense. Lightly tuned, or on the cheap, I have no issue with FX-4, and numerous other CPU's under i3.
Now this would be an example of a PC built for longevity. It starts with a decent mobo, cooler, and PSU, but the cheapest FX, to be overclocked to the gills. There's little concern over chip life, because the plan is to replace it in a year or so anyway with an 8-core FX. Heck, the plan may even call for a graphics card upgrade, but the core of the build is chosen to last.
Hmm, I WAS done commenting....
OK, so part of me likes this idea, especially at first thought. It could be fun.
Yet part of me feels we are then even more so settling for less than we'd eventually want (an earlier comment you had). What I mean is, a Z-series mobo, G3258, solid PSU with reserve, and an aftermarket cooler could later drop just the $70 CPU expense and insert i5 or i7 K-series.
Typically I am dead set against putting big money into a G3258 OC, but not if done so with full expectation to OC i5/i7 K shortly down the road when funding is available. My own G3258 purchase is paired with a Z-series and $30 air cooler, yet I haven't had the time to tweak it yet. Eventually, it will be pulled for i5, like the 3 machines my kiddos game on.
On the flip side, what is most likely to drop in price or lose value over time? Probably graphics. So maybe securing i5 with weaker graphics, is the smarter future-thinking plan. Of course, if dropping funds on a new higher-res display, then graphics needs to be addressed. But it's possible graphics and a new display are where those (Birthday or tax return) funds will later be aimed.
That said, you and I are not the norm, and I must agree with what others are saying too. The reality is likely less than 5-10% of the custom-built forward-thinking PC's I built for people (or helped spec out) in the past ever saw a significant upgrade. Typically, it was storage or more RAM when needed (and cheaper). Most of my closest buddies had overclock-able and upgradable rigs, but never augmented the clocks or put in a new part. The exception is when I gave them a spare graphics upgrade. I'd pass on links to killer upgrade deals, and time and again they would not jump on them, replying they'll just wait and build a new machine some day.
Anyway, sorry for the book; just thinking out loud with you, and pinging feedback....