the coolermaster elite 335 is only 185mm wide so cooler clearance is going to be an issue, they list it as 166mm clearance, however a Thermalright HR-01 Plus (159mm tall) has issues and the ends of the heat pipes stick into the side panel grill holes, so I'm guessing they are using top of stand off to side panel measurement.
Your best bet is take the stock cooler off your cpu and actually measure the distance to the side panel from the top of your cpu.
You could play safe with the Thermalright SI-128
http://www.scan.co.uk/products/therm...without-fan%29 (note it's sticks out 91mm so only need 106mm clearance) then add a 120mm PWM fan (my choice would be the lovely Akasa Apache
http://www.scan.co.uk/products/therm...without-fan%29 although the total cost is a bit high.)
The Xigmatek hdt-D1284 should fit, it's a bit taller than the silverstone but a good price and comes with a fan.
http://www.scan.co.uk/products/xigma...t-d1284-cooler
EDIT: while there's no back plates involved, you'll want to take the motherboard out of the case to fit the cooler, this isn't an issue with the mounting system but a physical constraint of any oversized non-tower cooler, you have to reach under the fins to get to the socket mount and that's just not easy to do inside a case.