I am really loving this John Deere X540!!!
Options added so far include:
Mulch kit
Front brush guard
2 40lbs suitcase weights
Rim Guard in the rear tires
JD rear Wheel spacers
Halogen headlights
single bucket holder
JD Tractor Shovel
JD 10P dump cart
JD Core Aerator
JD Spike Aerator/Drop Spreader
CD Sweeper
Hitchin Post
For all the details of the X540:
http://www.deere.com/en_US/ProductCatalog/HO/servlet/ProdCatProduct?pNbr=SKU21857&tM=HO

New 4-year limited warranty for Select Series - 48 Months or 500 Hours, Whichever Comes First

Power

* 26-hp V-Twin, liquid-cooled, John Deere iTorque Power System (which provides more lugging ability, full pressure lubrication, even cooling, and durability) provides excellent power and performance, easy starts and smooth operation.

Performance

* 5 U.S. gallon fuel tank with a large 3-inch fill opening located on the left fender makes adding fuel easy and helps eliminate spillage
* Twin Touch automatic transmission provides comfortable two-pedal foot control for effortless speed and direction changes
* Foot-operated traction assist locks rear wheels together for increased traction
* Power steering provides effortless automotive-like control with a tight 22-inch turning radius and excellent maneuverability
* 48-inch Edge Xtra Cutting System is designed to provide excellent performance in all conditions and operating modes including side discharge, mulching and material collection
* rear heavy-duty all-purpose tires for increased traction and ride quality

Durability

* Heavy-duty welded frame for the strength to operate a wide variety of equipment
* Built-in front and rear weight brackets
* Front axle is made of nodular cast iron; strong and shock resistant, it will not yield under heavy loads or impact
* 1-in. steering spindles provide the durability to mow more acres
* Internal wet disk brakes for quick stops and long life

Convenience

* Heavy-duty CargO Mount attaching points are designed into the tractor for easy attachment of optional equipment
* Standard tool tray and cupholder keep tools and beverages within reach
* Color-coded controls are conveniently located for easy access
* Convenient dash-mounted fuel gauge indicates fuel level
* Standard hourmeter makes it easy to tell when oil changes and other maintenance should be performed
* Separate engine speed and choke controls make starting and warming up the engine easier in cold weather
* Mower deck height-of-cut control with rotary dial knob provides mower cut height range from 1 to 4 inches in 1/4-inch increments; on-board deck-leveling gauge located in the center of the cut-height adjusting knob
* Hydraulic lift control for mower deck positioned on dash near steering wheel for quick, easy and precise fingertip control

Comfort

* Comfortable, high-back sit-and-adjust seat features 7 inches of travel; springs adjust for operator weight allowing fine tuning of suspension; open-back design allows air circulation to keep the operator's back cool and dry for a more comfortable ride
* Large 14-inch diameter steering wheel is comfortable to use and minimizes steering effort
* Full-length foot mats provide comfort for the operator while protecting the footrest area
* Roomy, uncluttered open platform and fender handles makes getting on and off the tractor easy
* 5-position tilt steering wheel for increased operator comfort