I predict you will get a different answer from everyone who responds.
I prefer CRT monitors to LCD and my favourite brand is Iiyama. There is nothing wrong will Dell monitors; many of the machines I work with have them and in terms of both quality and reliability they are fine.
The variation, especially in colour and clarity, between different models of the same brand never mind different brands can be so great you really need to get down to Comet/PC World/... and stand in front of some (Particularly if you are considering LCD as both the viewing angle and pixellation when close up can be a problem).
As you are interested in gaming. Do bear in mind that the refresh rate on the best LCD monitors is still upwards of 10 milliseconds and nearer 30 on the cheaper ones. On a CRT it is negligible. Insist on seeing a fast action game played on the monitor before you spash any cash.