I have just bought 16 BumGenius and they are BRILLIANT! My DH is very anti-real nappies, so I am stuffing them when they are dry and just lining them up by the change mat. So simple, even he gets it right!
I have a couple of 2 parts (Little Lambs, v similar to Tots Bots) and the bamboo are very absorbant but take FOREVER to dry - seriously, 2 days including me getting v cross and chucking it in the tumble dryer! BumGenius also work well at night with 2 big inserts too (although DS only 6 months) and there is room for booster in future if needed.
Also BG only have one lot of velcro to fasten so it's easier when he wriggles and tries to turn over half way through a change.
If you go for BG, try www.lizziesrealnappies.co.uk as they have 15% off orders until Sunday so £12.54 each, cheapest I found...