"Really good" - hmm that's loadsamoney. Andy Cavan's Armstrong, and Jay Turner's Armstrong are both nice (and very loud), William Pint's Goodall is glorious. I don't like Taylors. Les Irvine's 12 fret slotted head dreadought Martin (high-end) sounds great, and the similar shaped Collings that Mike Nicholson plays is also lovely.

I once heard a Fender Custom Shop acoustic (dreadnought) that sounded really good.

Fisheye's Yamaha FG 360 is right up there. My late wife's Hagstrom J-45 has a wonderful shimmer but could do with a bit more grunt. My Mugen THE78 is good, big thud and ringing trebles, lacks a bit of cut in a crowded mix.

My "beater", a Morris, works well plugged in, pretty good bite and a piano-like quality on the lows probably down to the extra-long scale length (26"), but a bit "b"-ish. My daughter's Sigma DM4 works well plugged in too and the stiffer top enables you to turn it up a bit

I like the big boom of a good dreadnought. I like the complex resonances of some L'Arrivees.

"Stage" - don't be silly, people pay me to go away, not perform on stage!!

Cheap? Ayers or shop carefully for a good Indie, or a Lamaq. Or a Sigma and a bit of DIY setting up.

Or take a total punt on ebay. If you don't like it, sell it again, and mostly you are only down a bit on postage, and if you sort out the action and put decent strings on you can cover your cost completely - I did that with a Sigma DM1 that was to trebly for my taste.