If you want to isolate the amp from the floor (and why wouldn't you?!), and aren't adverse to a very slight amount of DIY, the following will make a great amp stand:
1- Buy a sheet of 3/4" Baltic Birch plywood, and have the supplier (a small independent lumber retailer) cut you two 18" or so square pieces. Install three spikes in the bottom of one of them and set in on the floor.
2- Buy a small bicycle inner tube and very, very slightly inflate it. Set it on top of the plywood. The inner tube should be as close as possible in diameter to the plywood, but no greater than.
3- Set the other piece of plywood on top of the inner tube.
4- Buy a set of three roller bearings and place them in an equilateral triangle on the top piece of plywood.
5- Set your amp on top of the roller bearings. The pressure in the inner tube should be as low as possible, just enough to lift the top plywood plank off the bottom one.
You now have isolation in all three planes (lateral, vertical, rotational) down to about 3Hz, lower than all but the best and most expensive isolation platforms (made for electron microscopes and such, and costing $2,000-$3,000) available, and for less than $300.