Just bought a new bed (mattress and base) 2 weeks ago, have had some back problems so researched what I wanted.
Found some recommendations online from Irish orthopediac (or chiropractic) association (cant remember which but found the recommendations on rte website I think.).
Two recommended (both Irish) were Respa Backcare and the Respa Visco Bonnell 350 or 700.
Went to Des Kellys to lie on them. The Respa Backcare was cheapest, followed by VB 350, followed by VB 700.
Ended up buying the VB 700 - mattress alone was over 800 euro.
Got it home delivered at the weekend and I am not joking, its the best nights sleep I ever had. Its got a memory foam topper and its a medium firm mattress.
I feel like Im floating above it rather than being in it - if I lie on it on my back I can feel the support along my whole spine.
Have only been sleeping on it since the weekend and my back feels great - I was stuck on a futon mattress for the 2 weeks before it came and my back was in bits from it.
I have no affilation to any company mentioned above, just a happy customer.
Spend as much as you can afford - a good mattress is vital.
Edited to say - in total I spent just over 1000 euro - I just got a standard base, but got drawers put into it which pushed up the price a bit, and a headboard as well - but Des kellys were willing to do a bit of discounting so think I ended up with ~ 150 euro off.