yea, it is addicting, but, although i suggest looking for a new light or this or that, i still suggest going slow...
Getting that 'mature'/established tank is still a ways off for you and some others too...
I suggest like i did originally, fight the urge and go slow... dont setup a new tank, dont go bigger, not quite yet...
but, with that said, you can do what you want, and proceed...
If you find the stuff cheap, then it wont be so bad, but if you pay retail then you have some risk... when ou are going thru the year and yyou find out that the electric bills go up, the maintenancnce goes up, cost of maint goes up, and your life gets more busy, then things/attitudes may change...
or, you might not have the success you thought you would...
either way, when you sell your stuff, you will lose all kinds of money... and with that and the remorse for not 'succeeding' will double the feelings of sadness
anyways...
I preach from a plce of conotradiction... as i too, bought two tanks when i started... and then within a year, i had already bought a large tank, 180g, and sold the smaller tanks for about .25cents on the dollar...
something about spending money and learning, and all that.. but really... NOT....