I used to use a small PA but have now changed to a setup similar to Hamish's (except I use Laney 65W acoustic combos) boosted, if necessary with a Behringer 60W bass combo. One Laney alone (it has a XLR vocal channel) filled a reasonable-sized hall a couple of weeks ago for Patricia and myself (vocal and guitar) doing some jazz numbers.

The AERs are ace (as are Ashdown amps) and tiny (I would love to use them) but quite pricey.

Peace

moo