I own a 5 series HB with di, works great. But with all the hype about si, it seems the way to go. Saw some images posted and Im in love and can't wait. I fish a 14ft jon boat and heard I'm fine even if I don't upgrade boats. Just not sure which unit or set-up to buy. I grew crappie and bass fishing and recently started fishing brackish waters (J R edges). I'm open for any and all suggestions and pointers. Thx Howard