Is a revo 2.5R good for brushless conversion?

[Misfit7734]

well heres my story. i got back into rc a few monthes ago. Then i went and got a 3905 emaxx and love it. i was going to brushless it but read somuch about the e revo and didnt want to loose the waterproof so i decided ot buy one. My friend who always hasto have best of the best said he had bought a revo played with it twice and got sick of it and said 150 for it minus engine and exhaust. so i bought it figuring it would handle much better at high speed than the e-maxx. My main question is since i am on a budget is it a good idea? is it really that much better than a max? I checked on tower and it will cost me about $70 to get all the 3.3 chassis stuff. Is it worth it? is the difference between the 3.3 and 2.5r that big? Or shuld i just give my friend back the truck and spend the money on modding the max? Sorry to ramble on and thanks in advance for any answers.