dude i've had both and it isn't much harder to steal one of the bigger ones with the digi locks than it would be to take the smaller ones..the only real diffrence is about 100 bux diffrence in price....granted if you wanted to keep a decent sized bong you'd need the big one but why put all that money into something that could be stolen as well.....a 14 year old skinny wimp dude could pick one up and walk off with it....and incase you post back that it would look suspicious someone just carrying out a big safe out the front door......this dude has got to have windows....and they could easily fit through one...