IMhO you can't really go wrong with a VU+Duo. The price of an original from the site sponsor has now came down making it better value.
Everything on the VU+Duo works as you would expect it to. The image support is very good and it has a large user base so there is always likely to be someone with the same receiver who will be able to assist in the result of any issues. The lastest Blackhole images have added quite a few inn***tive new features.
The VU+Uno is also a good single tuner receiver which is cheaper than the Duo. However, a Dual tuner is due to be released for the Uno later this year which would enable you to upgrade an Uno to a twin tuner at a later date. The Uno had a few teething problems at the start with certain channels but these were resolved in a firmware update. The Uno has greater flash and ram compared to a Duo which may make a difference if images keep increasing in size.
Current clone Sunray DM800SE's are meant to be solid and also have excellent image support.
The new Gigablue 800SE is meant to be a good receiver and is priced reasonably.
The Xtrend range of receivers are also excellent. The Xtrend 9200 is a great value twin tuner receiver which a higher spec on paper than a VU+Duo but possibly less third party image/software support compared to the VU+Duo.