Buy the biggest tank you can afford. Buy a stand you like and can afford. Buy some gravel you like and can afford. Then come home and go shopping online. Buy all your supplies, heater, filter(s), test kit, water conditioner, food, etc. online at either bigalsonline.com or petsolutions.com You will save BIG BIG BIG $$ compared to buying your stuff at the LFS. You can even buy your hood and lights online if your new tank doesn't come with them.
When you get home with your new tank and such, let us know how big it is and what you plan on keeping. Then we can advise you on what types and sizes of filter(s) to buy, heater, etc.
HAVE FUN!!!!!!!!!!!!!!