Re: Extreme Flight Edge 540T 48"
The Torque and even the Omega motors always get great reviews... they are great products...
An alternate brand that I have always liked though is Motrofly... but they are bracketed over and under the Torque so I'm not sure if you'd be better off... but look at their 2815 ( just under ) and 2820 ( just over ) series if you want to look at something different
Motrolfly brushless motors for USA and Canada
Just about anything they have in any of their lines will sport fly good ( ok great ) but pattern plain wise... you will likely want something with a slightly longer fuse... the 540T isn't going to be the best pattern flyer although it would do in a pinch if you need it too... now the Vanquish MKII is made for pattern and will also be a pretty nice sport flyer as well.
I've had the 3D Hobby Shop 48" Viper ( crashed it after a servo failure, it's now discontinued in a single wing configuration ) and I was flying with 3S batteries and felt it was plenty quick at the speeds I was getting. Using 4S batteries would certainly let you fly faster but with less flight time and also adds weight to the airframe making them less agile. I'd recommend you think a little bit about the 3S vs 4S setups... a 48" airframe isn't a huge one and I think you'd be happy with 3S, save a little money on batteries and weight so you can keep your wing loading to a minimum. Just a thought.
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Let me add another suggestion also...
I've only flown the 3D Hobby Shop planes but they and Extreme Flight have always been neck and neck in quality, performance and reliability ... Both companies, before they joined together were known for giving good honest opinions when they were asked and it didn't matter if it was about a product they carried or another brand they didn't... In fact, I often saw posts by the owner of 3DHS ( Ben ) recommending an Extreme product when it fit what a person had posted their were looking for... that was before the merger. It was the same for other products such as motors and ESC's as well...
Give them a call... ask the same question with whomever you talk with... this will give you yet another suggestion to take into consideration that I believe you can trust as well as anyone here. They are trustworthy in my opinion and you'll only add to your knowledge.