I am 15 so I have a limited amount of money I can spend. I am probably only able to afford a complete set and have been looking at some kenwoods and onkyo but would appreciate some advice. My top price is probably going to be 450 or so. Also, would it be bad to have the front speakers elevated higher than the rest? and is wallmounting the back 2 alright? I am not very good with these things and will probably need to be walked through it. I am using it for xbox, music, and tv and dont need it to be at the exact places to produce the "best" sound capable from the speakers. Thanks alot for the help in advance.