The 4yo is starting to outrace me on his bike (i generally jog along), and I'm looking at buying a bike to ride along with him. Also with my change of career, I can now ride to work (and sit on my backside all day, so I NEED to ride to work), whereas before I needed to cart too many tools with me....

Question is.....what sort/brand of bike would suit me? I know that riding and windsurfing are a good combination, also I need to get/keep fit, as well as enjoy time riding with the littlies!

Stats; 6'3", 110kgs, 35yo, light pockets!

Requirements; to enjoy a ride with the family, go for the odd workout ride (road), go offroad (good walking/riding scenic tracks around this area), and ride to/from work on a semi-daily basis.

Any advice would be appreciated......here's what I've learned:
Bikes from $70.00 at Kmart (don't reckon it'd last) - to - $6,000.00 for good carbon road bikes (not a chance! would rather spend 6K on w/surfing gear!).
Hybrid is a word that was tossed around by a mate?!?
Prefer pre-loved and quality than new crap if price came into it!
Whatever I spend.......will have to be taken from my w/surfing purchases annual fund!