Help and advice needed please

We (Richard and Penny) don't own a motorhome yet because we're not sure what's available which will give us what we're looking for. What we need is one where there are two double bunks on the same level in a low profile 'C' class. It has to be diesel and should be around 23 feet max length (or it won't fit on our drive). The shower compartment cannot be behind the driving seat because I need the seat to be adjusted back as far as possible. The only one we can find which matches this specification is a Swift Kontiki 660. Any ideas/suggestions anyone?