Well I think either a 851/888/ or 916 style  would be a good investment.
  The above more so than the 999. 
 The 998 is fetching more than the early 999 at the mo. 
 My advice would be to follow your heart, I do think your servicing costs would be lower with the 916 shape against the 851/888.  
 Oh welcime to the site mate 
