PLEASE HELP - ENGLAND CALLING...

Now I know being English I should really be able to build a Sopwith Camel - but having read the thread I need some advice guys . Just bought the Hangar 9 Sopwith - looks a great kit by the way - but I am an electric person (I know - I know you IC guys crying). However I have a great sound system - 4" speaker etc. - Canadian system i think - to make it sound real. I have some questions....

1) I have both an Eflight (see supporting America) E60 and E46 and am wondering which to use if I am carrying about 10oz of sound system as well (speaker, amp, battery etc.) . The manual says E46 but some of you guys used the E60 - I have both 6cell and 4cell batteries. What would you recommend?
2) Test fitted the E60 as per instructions and there is no way the dummy engine fits - its hits the mount! - how do you get around this please?
3) Should I put the sound system in the cowl - the speaker fits ok there and I assume it will help the GC - assume depends on motor though?
4) Got an Eflight 60 Amp ESC which claims to allow 60 amps continuous 75 peak and STILL drive up to 7 normal servos - do you guys trust this to work ok with this plane or should I use a separate battery and BEC for the receiver ( I normally do on above 4lbs but this is the first ESC I have found that claims to do this - advanced technology) ?

All advice appreciated

Thanks guys

Bithwaite