Harman issues full warranties via the Ebay store, but I've never had a failure with a Harman receiver. The software is annoying, but the products have had very high reliability for me. Their speakers have drivers on par with speakers in the 1000s range.
The Classia Speakers have the best midrange driver in the world IMO. If I were a rich man I'd have a full setup using them. Unfortunately they cross the driver much lower than it's premium range. The drivers are also rectangular making them a royal pain to mount for me.