We used Furniture Express who are based in Estepona - we have a property in San Miguel, Costa Blanca. They were top class, nothing was too much trouble despite me changing my mind (often!). We couldn't visit their showroom but they sent me loads of emails with pictures of bedding, curtains, lamps etc. In the end there was so much choice we left some of the design to them and we are delighted with the result.
The quality iof the furniture is good, and modern, the installation was done on time, and with no mess by two great guys. On top of that we got loads of extras (lamps. vases mirrors, rug etc) which we didn't expect. Highly recommended!
Not the cheapest but it was well worth what we paid.