Can anyone out there suggest any modifications to the factory 2010 Sunsport 21V? I was thinking of upgrading:

1) Ballast
2) Bimini (to a z5 cargo rack)
3) Dual battery
4) Warm water wash (not so sure about this one though)
5) Tower racks (any suggestions on which ones - we mainly surf)

We are a family with young children so not looking for anything too radical! Any advice is appreciated.