welcome :P :P
first of all, try to do some calculation before you start your tank.
the facts are, smaller tank is harder for beginer and harder to keep stuff at good condiction.(cuz the less water volume usually doesn't allow you make any mistakes)
Look at how much you can spend and make sure you get the best you can get.
tank probly isn't the most expensive factor here, it is the stuff that going to be needed for the size of tank you going to buy.For example, if u want to start with 29g, it is ok, then u probly need a 20 inch lighting or something like that to give you enough light and u need a small heater to keep the temp.However if you want to go bigger tank, all those coast will go up)
Second, type of lighting will be depending on what you will keep in the tank, is it fish only? is it with coral ? Reef tank will require more lights, which you will spend a bit more money on it.
If you want to go for reef at the end, what ype?do you want to just keep basic mashroom?or do you want to go advance to SPS
?These can all change the equipments you will need to buy. LR
and subtrate are less complicate, but they are important, do some reserch on how much of each of those neded for each type of fish/inverterbrates/coral you want to keep.
I might want to add more on wat i have said, but second thought there might be too much need to say before you can get it right the first time.
Try take a look www.wetwebmedia.com
, read throught those articales.
Again, try to buy the biggest tank, the best lighting you can get to start with, you will be suprise how much money u saved at the end.
PS: I am not telling you just run in the lfs
and grab the most expensive one u can get, however some knowledge is needed for each item u will be purchasing and be respoinsible.
Maybe my english isn't good but if you need any info u can always PM me or even reach me from msn