anyone have any experience with the Garmin Striker 4dv
https://buy.garmin.com/en-US/US/on-the-water/fishfinders/striker-4dv/prod528816.html
Looks like it is just what I need. My question is : It comes with a t20 transducer , says for HD I should upgrade to a t22 or t23 which cost more than the unit itself. Will I be ok as an entry level electronic user with the t20 transducer that it comes with . Screen shots look pretty good, I like that it has all 3 in one(sonar, Dv, GPS) for $179