Yamaha THR5A

Amp sounds great, period. If you have a dull sounding rehearsal room, living room or bedroom, this will save your electro-acoustic day. Great mic models, great reverbs, very acceptable chorus and compressor effects.
As a recording tool this works great as a first step, laying down acoustic tracks. Be careful with latency though.
Two drawbacks:
- USB computer volume (while recording) can only be set via the PC interface software.
- there are no presets. When you use this amp with multiple guitars, you might want those...
I have a THR10C too, which does have presets and a USB volume control.

This is really a nice small and very amp to use at home. Its very small and light weight, but despite that it sounds very good (stereo!) and has fine build in effects. Its main focus is acoustic guitar, both steel and nylon string. You can create a wide spectrum of sounds with various mic simulations that you can blend with the piezo sound and a tone control knob. Also an electric guitar can be connected, and that sounds very clean, and that especially is good when using it with external effect processors or pedals. And if you still want more, just connect it via usb and start the THR editor to change all parameters and even reveal more effects (phaser, flanger, tremolo, various reverbs etc) which are not selectable on the device itself. One big negative point, the amp is not very good in low frequency tones. Don't put up the low freq EQ on your guitar preamp, else the speakers start clipping when you turn up the volume too much. I also own a THR10 series amp and that one has far less problems with clipping.