i have used both intakes, and i can tell you that application to application, they are very similar is performance. the qeiand action plus vs the edelbrock performer are nearly identical. the weiand stealth vs the performer rpm, the weiand stealth has a slightly wider rpm range, but not enough to make any real difference.
i say decide what rpm range you are building the engine for, and go with the intake you can get at the best price. as for the carb, i recommend the edelbrock carb as they flat out work great out of the box, and have more tuning range than the holley does. but again, you pays your money and you tales your choice. one other carb you might look at is the summit line of carbs. they are similar in design to the old autolite carbs, but use a lot of holley parts. the advantage over the holley is that they dont run fuel through a gasketed area like the holley does.