Id recommend HP/Compaq last year but i have had to contact them regarding a few faulty printers this year and they have not been the most helpful and do not seem as competent anymore plus they send you round the different departments in their call centres like nobodys business.
I remember a time when if you had a fault with a HP product one fone call to support and they would replace it the very next day via courier even if it was with a refubished product