Cheers for the help, my idea is to buy one of these
http://www.stewmac.com/shop/Electronics,_p...s_T-Bridge.html
Considering it claims it is "high output" and comes with the wiring to directly wire it to a jack, i may just get the bridge then wire it up to see if everything works and buy a preamp if it doesn't. I think this may be the best option.
Just to confirm, i could use a toggle switch like this
http://www.stewmac.com/shop/Electronics,_p...e_Switches.html
to switch between signals on a mono jack. It just seems easier to me if you can switch between acoustic - all - electric quickly and blend them together by altering the volumes than having the whole thing separated as then you can't blend them on a guitar