Looking for Queen size bed with budget at 2k. Had back issues previously so prefer a medium to firm type of mattress. Saw some recommendation on old replies and plan to visit places like viva home to experience few beds to have better idea.

Manage to check few mattress stores during last weekend at Viva. Certain models I'm trying to view/test like KK Prince collection Sapphire are obsolete. Tested the Prince 2.0 Imperial Topaz and quite like it. Sales person shown me few more models as well(1st knight not sure which model via pic as there's none in showroom & Simplicity). Checking out Goodnite and there's a promotion model Preston with coconut fibre, feel not bad as well and below 2k. Didn't manage to test the Vono Spinepro 1200+ as sales uncle shown me few models but bit soft to my liking. So my question is which mattress does fit KK Imperial Topaz criteria with topper? Mainly looking for medium firm type. I'm trying to keep my budget at 2k but I'm willing to stretch a bit if it's good.