Hello, I am in the process of buying a new walk behind to complement my 2 current 52" Lazer HP's. I definitely want to go with the electric start which narrows my choices to either the 19 HP Turf Tracer HP with a 52" deck, or step up to the 23 HP full-size Turf Tracer with either a 52" or 60" deck. My question is what is everyone's opinion on the two? Is the full-size machine more robust, does it hold up better, better features? I plan to use a velke, most likely the Exmark "Stand-On" so that may be a factor. What are the pros and cons of both machines? Is the full-size worth an additional $800? Also, what is everyone's opinion on the Exmark "Stand-On"? Is it really worth $400, or should I just go with a single or double wheel velke? Does anyone have a preference between the single or double wheel? Finally, should I go with the 52" or the 60"? They are very similar in price, so should I go for more cutting width or more maneuverability? Any advice is appreciated. Thanks!