Advice on Artisan tailored pocket mattress from John Ryan

Dear Sales support. we are looking to buy a new king sized mattress, probably an Artisan Tailored or else an Artisan Bespoke 004. My wife is 5'4" and 13 stones and I am 6'2" and 14 stones. we have an existing divan base (4 drawer) with sprung edge. can we sensibly re-use our existing base please?

can you recommend the better format mattress for our weights please?

we both dislike the memory-foam type finish on beds. How long a lead time can we expect for the mattress after ordering?

kind regards