According to quite a few review sites, the top 3 Dishwashers are actually the same!
Starting with the top dishwasher according to these reviews, it is the Whirlpool GU2275XTVY the reviews are as followed and are out of a score from 1 to 10, 10 being highest!  This model got:
9 out of 10 overall look
10 of 10 value for the money
10 of 10 in features!
You can find this model at Sears selling for $487.49!
specifics are:

• Get dishes clean in a hurry - Glass Xpress™ cycle conveniently washes glassware or lightly soiled items in just 30 minutes
• ENERGY STAR® qualified appliance
• More usable rack space - The AnyWare™ Plus Silverware Basket fits in the door and in other locations to free up rack space where you need it most
• Wash tall or odd-shaped items with ease - The upper rack adjusts easily so you can accommodate different-sized items on the top rack
• Minimal dishwasher noise - The Quiet Partner™ III System minimizes dishwasher noise so conversations aren't interrupted
• Let your dishwasher choose the right cycle - Adaptive Wash determines the size and soil level to select the best cycle for each load
• Premium, attractive interior - The slate-colored interior reduces the appearance of tub stains to keep your dishwasher looking great

Next is the LG LDF79325T Reviews are:
9.2 overall
9.6  value for the money
9.3 features!
You can find this at Sears selling for $722.49
specifics are:

• Delay start up to 24 hours Dual Intensity™ Wash system allows for customized cleaning on the upper and lower racks at the same time
• Accomodates up to 16 place settings or a variety of large pots, pans, and bowls
• Adjustable Upper Rack can hold up to 10 in. plates and stemware, and Lower Rack and hold up to 14 in. plate
• This SteamDishwasher™ allows for TrueSteam™ power to be used in any cycle for more premium cleaning
• Fully-Integrated dishwasher with electronic hidden controls for a sleek look

Next is the Kitchen Aid KUDE 70FV55! The reviews are:
9 overall
8.9 value for the money
9.1 features
You can find this at Number 1 Direct selling for $1198.99!
specifics are:

A Bosch. Most of the other brands currently available are actually made by the same manufacturer anyway.

The mid-priced Kenmore dishwasher receives high scores for excellent cleaning ability and very low noise, but it doesn't have quite as many extra features as more expensive models. The Kenmore dishwasher skips the… stainless-steel tub in favor of a plastic tub, which helps to reduce costs. It has a delay start and a quick-wash cycle, along with extra sound insulation for lower noise. The Kenmore 13742 comes in white, bisque, black or stainless steel (which costs $100 more). All models meet Energy Star standards. As with all dishwashers, we found a smattering of complaints about long-term durability, but most owners are very satisfied.

MORE OPTIONS BELOW

According to http://www.consumersearch.com there are 3 brands when considering the best.

For best value it is recommended to go with the Kenmore 13472 which is priced around $560.00

• Received high scores for excellent cleaning ability
• Very low noise

For best luxury dishwasher it is recommended to go with the Bosch SHX98M09UC which is priced at $1,550

• Excellent cleaning ability
• Efficient
• Extra features
• No heated drying cycle (con)
• No hard food disposer(con)
• Pricey(con)

Recommended for the best basic dishwasher is the Whirlpool DU1055XTVQ which is priced around $400

• Good cleaning ability
• Energy Star rated
• Not as quiet as some dishwasher models(con)
• Bulky controls(con)
• No stainless steel option(con)

As you can see from the brands listed above you definitely have a few choices. Ultimately, its your decision and your preferences as to what you would like. Happy shopping, hope you find the product right for you.