We spent a long time looking at all the different smallish wood stoves out there (and reading all the valuable DIY info on the Stovefitters excellent website), and eventually settled on the Aga Wren, despite not having a particular loyalty to the Aga brand.
The features we particularly liked were:
1. The pleasant styling, which we think bridges the gap between traditional and contemporary;
2. The unusually large firebox (we were uncertain what size stove we needed, so this gave a bit of flexibility); and
3. The unusually large, and nicely shaped area of glass, so you can really see the fire.
We also appreciated it being made in the UK, rather than China, as we were concerned about working conditions in China (my wife says she remembers reading it on the website, although we didn't get a response to our email asking Aga to confirm this).
We had no particular problems installing it, it seems well built (it certainly weighs a bit!), and now that we've used it a few times we can say that it seems to work very well. We have yet to run it really hot, but don't anticipate any problems. The airwash system is effective and the burn is easily controlled.
We think we're going to get on very well with this little stove (which isn't actually all that little), and would certainly recommend buying from Stovefitters. They always respond very quickly and really seem to know their stuff.