I agree with the comments on the vocal clicks and noise.You might be able to remove some with careful editing or using a Volume envelope on the track and,"Ducking" the offending parts by zooming right in. The acoustic sounds a but dull.If on a budget and you can re-record take round wound strings off if they are old and boil them in a pan of water with half an egg cup of washing up liquid for half an hour.This will clean the gunge out of the windings and brighten them back up for a while. Also see section 17 of the Reaper 3 manual on channel splitting the Acoustic into different frequencies and panning them.Also a little subtle stereo chorus on the guitar can enhance the sound and give it more depth with a touch of reverb.The free Classic Chorus is nice for this, HTH :)