My guess is you will probably get a MK3 for not much more than the older types with the probable advantages of
modern mast
Decks are clear ( this is a big thing )
modern centreboards
modern rudders with kickup
modern curve and design of traveller
looks relatively modern
Rockers on some older models are forward more so have to have extra long tillerbar and hike way forward. ( this may suit you more if you are going out through surf )
Rounded hull making tacks easier and faster.
Should be around weight
I purchased my older A as a second boat and wouldn't hesitate to do it again
regards