JRBD Bed Recommendation

Good morning,
We have visited our local bed store to try out some of the Harrison range. We've been through your range so know their exact make-p is a bit of a mystery, but just in case you know the feel of their beds, we very much liked the feel of both the Chantilly 4700 and the Boucle 3200, both in firm. We initially entered the store with the classic, we love the Premier Inn beds, but preferred both of these slightly to the Hypnos one which they told us was the Premier Inn one. We're conscious that Premier Inn don't keep their beds for 8 years, and some of the feel will likely be from the fact they are never that old. We've read that you recommend the Origins Pocket 1500 as a good alternative to this, which comes in at £1090 in a zip and link super king c/w 4 drawer base thus, we are looking a this. However, having looked at the Harrison Chantilly at being around £1800, we're happy to spend a bit more, perhaps somewhere between the two at £1400-1500. This made us think of the Artisan 1500 mattress, but by the time its paired with the 4 drawer base we're looking at £1925. Could this be paired with the cheaper platform base, or is this something you wouldn't recommend?
Having discovered yourselves we are convinced what you can offer would likely be superior to the high street brands so would like some advice on our thoughts above. For your info i'm about 5ft10 and 17st and my other half is around 5ft6 and 12st. I would note however that she did prefer the firm mattresses we tested.
Kindest regards,
Lewis