I currently own a 2001 48 inch Viking Hydro with the 15 hp V-Twin. This upcoming season I am looking at getting either the 17hp TTHP or the 23hp TT with a 52 inch deck. I have a couple of concerns considering this purchase. I like the idea of the 23 hp engine because of the power it would give me in all mowing conditions, but I can't get it with a 48 inch deck, I have to go with the 52. Can I match my striping close enough with two different decks, or do I need to settle for the 17hp TTHP? Is exmark ever going to offer a larger hp engine with the 48 inch decks? I have been pondering this purchase for quite some time and would appreciate a well researched response. I would also like to know if the 15hp on my viking can be replaced with maybe a 21 or 23 hp engine? Thanks!