You really won't be able to play unamplified with even a couple of guitars and a couple of singers.
I own both the Dean and the Ibanez. The Ibanez is far higher quality, better electronics, sounds much better amplified, very solid feel, quite heavy for an acoustic. Doesn't resonate well, and is practically useless as an acoustic, unless you are by yourself.
The Dean Playmate is very light, very cheap feeling, resonates quite well, probably in he top 30% for acoustic volume. + 1 on needing to add a set of heavy bronze strings, so count on adding 20% to that $150. The Dean easily gets a slapping sound when played hard. If you have an amp with a lot of low end EQ, you can make it sound decent.
I use the Dean 4 to 1 over the Ibanez. Weird. I guess it's because I have a few dozen electric basses to get the amped sounds I want. Also, the Dean is so cheap I don't worry about taking it out and banging it around a bit.