The E6850's appearence in this month's chart is abit of a surprise - as a general rule of thumb, the E6750 and E6700 are better options. But all of these processors are incredibly fast and would make a good addition to any �750 PC.
If you've got one eye on the future, you might want to consider a Core 2 Quad chip. You'll sacrifice a little speed for the money now, but you might make it up in spades when multithreaded software applications start hitting the stores.
Memory: It's a sign of how important memory has become that, even in the �750 category, 2GB is rapidly establishing itself as the standard. Only a few months ago, 1GB seemed sufficient, but you'd be well advised now to play it safe and plump for the extra gigabyte. It's only going to become more important in the next twelve months.
Storage: You can never have too much storage space. Digital media files such as music and video will quickly fill a reasonably sized hard drive, so buy the biggest you can - 320GB to 400GB drives are a good investment.
Display: To keep the price of the PC down, comprimises have to be made - and the monitor is often when the sacrifices start. Just remember that this is the best part of the PC that you're going to be spending most of you're time looking at.
All PCs now come in flat-panels. As for the size, 19in models are the most common. Be very careful when offered anything larger than this, as the quality at this price point could be low. Look for a screen with a good response rate - 8ms or below should be more than fast enough.
Graphics cards: Given that the best graphics cards can retail for �300 or �400, feverish gamers are unlikely to be best-served a sub-�750 PC. Nonetheless, the best machines in this category generally manage to include a decent graphics card.
Although 50fps (frames per second) is enough to make a game playable, you might want to set your sights a little higher at this price. Choose a card that can produce 80 to 100fps on a number of games. The 320MB GeForce 8800 GTS is excellent. The 640MB version is also fantastic, as the new ATI HD 2900 XT, but neither is easy to get at this price.
Sound card and speakers: You're unlikely to get a standalone soundcard at this price point as it's an area in which vendors are likely to cut costs.
Most motherboards have decent built-in audio chips that can handle six-channel sound, but to get the best out of them you'll need a 5.1 system in this category - indeed, you won't necessarily get a subwoofer at all.