If you don't mind knives that don't match, just buy a knife block and buy the best knife you can in each size. The most important one is the 8-inch chef's knife so spend as much as you're able to get a good one that feels comfortable in your hand.
The Cooks Illustrated site has done a lot of testing and here are a few results for inexpensive sets and inexpensive Chef's knives but you may have to register
and pay to read them:
http://equipment.cooksillustrated.com/printtesting.asp?testingid=557&bdc=6684
http://equipment.cooksillustrated.com/printtesting.asp?testingid=320&bdc=3840
They don't really recommend any knife sets. Here are their chefs knife recommendations:
SUMMING UP
Do you need to fork over $100 for a good knife? Not even close. The Forschner Victorinox, which cost just $25, was the clear winner in these trials, and it rivals the best of the pricey knives in our test kitchen.
Highly Recommended
Forschner Victorinox Fibrox Chefs Knife
$25.33
Comments: One tester summed it up: Premium-quality knife at a bargain price. Knives costing four times as much would be hard pressed to match its performance. The blade is curved and sharp; the handle comfortable. Overall, sturdy and well balanced.
Recommended
Wüsthof Gourmet Cooks Knife
$49.99
Comments: Best suited for cooks with smaller hands. Testers with large hands complained that their knuckles hit the board before the blade did. The spine of the knife was thought to be unnecessarily sharp, but this knife performed well in all tests.
MAC Chef Series Chefs Knife
$47.50
Comments: This ultra-light knife is also ultra-sharp, although the skinny handle doesnt fill a palm very well and the thin blade is too flexible to chop up squash or chicken bones. If you use a cleaver for those tasks, this knife could be a nimble addition to your collection.
Recommended with Reservations
J. A. Henckels Twin Signature Chefs Knife
$29.95
Comments: Described as hefty but bulky, this knife also has a contoured handle that can get slippery and didnt feel comfortable in all testers hands. The blade borders on being too flat.
Not Recommended
Calphalon Contemporary Cutlery Chefs Knife
$31.99
Comments: A dead ringer for expensive German knives, but the thick blade on this knife is heavy enough to tax even the strongest cook. Feels more like an ax than a kitchen knife.
Oxo Good Grips Chefs Knife
$12.99
Comments: A delicate knife not suited for even the most delicate tasks. The blade bowed and twisted even when used to chop parsley and it bent permanently when put strenuous jobs such as splitting squash.
J. A. Henckels International Fine Edge Pro Chefs Knife
$11.40
Comments: We found nothing to like about the cheapest knife of the bunch. This overgrown paring knife left absolutely no room for knuckles. The perfectly flat blade and shiny, slick handle make this contender a shoe-in for the junk drawer.
Farberware Pro Forged Chefs Knife
$19.99
Comments: Feels unfinished, and the rough seams between the blade and handle are uncomfortable. Forget slicing--we could only bruise onions.
Chicago Walnut Tradition Chefs Knife
$13.05
Comments: Shaggy, wooden handle needs some sanding. Dull knives bruise vegetables; this one doesnt even scratch the surface. One tester realized, this is why folks cut themselves.