Beertrain, It may be more appropriate to state how you will run this train. Conventional or command. If command, which system, DCS or TMCC/Legacy. At that point the sound choices may be more suitable to your needs.
There are pros and cons to each system and this may maximize your experience. As an example MTH sounds and features are accessible via bell/whistle combinations in conventional. TMCC/Legacy are not. You operate in COmmand than specific strong points for the various sytems would come into play. Lionel tends to have richer sounds, but MTH has synchronized chuff and smoke that is considered the best in the industry (imho), etc.... G