As for the performance, look at the benchmarks. an Intel i7 930 CPU beats anything that amd had, even the 1090t. there is a reason AMD parts are priced so low. that is where they perform.
Not True, not even close, basicly, anything that can utilize more than 4 physical cores will have the advantage on the 1090t thanks to the two extra real cores, while anything that can only use a maximum of 4 cores, will have the advantage on the i7-930. In fact the 1055t (stock) beats out the i7-940 (stock) in most benchmarks & programs that utilize 6 or more cores, and the 1090t (stock) even beats the i7-975 (stock) in more than a dozen synthetic benchmarks & some games. Unless you can afford a 6-core Intel CPU (i7-980 or one of the Xeon's), the 1090t is your best bet for Photoshop CS5 & Premiere Pro CS5, both of which can utilize more than 8 physical cores.
I'll leave you with this tidbit...
benchmark reviews wrote:
Benchmark Reviews begins our conclusion with a short summary for each of the areas that we rate. The first is performance, which considers how effective the AMD Phenom-II X6-1090T processor performance in operations against similar desktop CPU products. The first challenge is properly defining the competition, which by merit of price would be Intel's Core i7-920 processor, or could be the Intel Core i7-980X Extreme Edition CPU if you want to match the physical core count. If we base the competition by price (assuming AMD's assertion of a sub-$300 MSRP is legitimate), the Phenom-II X6-1090T is the hands-down winner on all fronts, as it beats the i7-920 in nearly all performance measures while also offering an unmatched price-performance ratio over the expensive i7-980X.
Aside from encryption scores, which shot Intel's i7-980X off the charts, AMD's X6-1090T delivered impressive results. The Music tests in PCMark Vantage certainly lend proof to at least one area of dominance, while the TV and Movies tests showed us that the X6-1090T could match performance with the 980X... and cost nearly $840 less. Gaming performance was moot, since most critics would agree that 1 FPS of difference is barely enough measure, and not enough to notice. In terms of real-world professional design application performance, nearly all 4-thread SPECviewperf benchmarks agreed that AMD made the best processor for their tasks.
Basicly, an AMD 6-core CPU is better for certian tasks, while a 4 or 6 core Intel CPU is better for other tasks, but there isn't a clear all-around winner... Yet because so many applications are still lacking support for more than 4 physical cores, Intel is better suited to a machine that does a wide variety of tasks.