Hi Mark,
 
 

 
Thank you for your questions.  It is impossible for me to see what advice you were given in June so I can only go on what you have written here.  When you said about spring counts I am assuming you are referring to our Origins range?  Those spring counts are in different models that have different upholstery ( comfort layers).  The Origins Comfort 1000 is the softest upholstery in the range whereas the Origins Pocket 1500 is a medium in the comfort layers, which means it has a slight sink in but not too much.  The 2000 spring count is the Origins Pocket 1500 but with 2000 spring for people over 17 stone.  The spring tension of all the Origins mattresses is medium which is the ideal spring tension to give you the correct support.  The comfort layers are personal preference on how you would like the bed to feel.
 

 
Trying a mattress in a showroom may give you an idea of what you are looking for if you know how long it has been there and how many people of varying body weights have already softened it first.  This will tell you how your mattress will feel in a few months or years.  You are correct that 5 mins on a mattress will not be as informative as sleeping on it for at least a couple of weeks.  If you purchase a mattress online from us and are unhappy with it, for any reason, we have the '60 day love it or return it' guarantee.
 
The depth of our Origins range is 13 inches (32.5 cm) and a king size is 5 foot (152 cm) by 6 foot 6 inches (198).  Due to the density of the fibres used in the construction of these mattresses they do not bend.  Do you have the clearance on your stairs for this size mattress?  Do you have a lot of 90-degree angles which the mattress would have to turn through to get it to the room of your choice?  One of the main reasons mattresses are returned to us it that they simply could not get into the property.  If you feel this may be an issue you may want to consider the zip and link option ( where the mattress is produced in two sections and zipped together).
 

 
If this is not a route you want to go down, another option would be a foam based mattress similar to your current mattress.  Our Hybrid range is comparable to some of the Tempur range.  I would recommend you look at the Hybrid 4 which has medium support in the core mattress and a softer topper for that sink in feel.  Both sections are fully turnable and the added benefit of this is that the topper can be changed when it is no longer responsive, cheaper than replacing the whole mattress.
 

 

 
If you would like to discuss this or anything else please do not hesitate to call on 0161 437 4419 and speak to our friendly team.  Our office hours are 8 am – 8 pm Monday to Friday and 10 am – 4 pm Saturday and Sunday.
 
Kind Regards
Michaela