Timing Is Everything
Another of my favorite vendorisms: "All roads lead to gigabit to the desktop." Many applications run just fine on 10-Mbps connections, and many vendors pushing gigabit in the closet are also pushing low-bandwidth wireless solutions and telecommuting products, so don't buy into their hype. If your applications work well in your current environment, there's no benefit to going gigabit. So again, trust your instincts. All roads will get you to gigabit to the desktop eventually. But take time to plan your trip, and watch the prices plummet by the time you're ready to roll.
Remember, too, from a vendor's point of view, all roads lead directly to your wallet. So stay focused on your ultimate goal, and be careful whose directions you follow to reach it.