actually i have no experiance with sw
. haha. im putting my first sw
together now. i had a planted freshwater in the past. i just do alot of reading so i can learn. so my knowledge comes from other people and there experiances.
as for what to get. nanos awe awesome. they require alot of work thou. big tank vs small tank = lots of work for both lol. nano tanks are more day to day maintance. less water valume = more water parameter swings. so you have to pay attention more on a day to day. bigger tanks require more work in weekly/ bi weekly maintance cause there is more to clean and look after. but i think personally the nanos pop out more with the colors. i think they look amazing. so dont get scared off by the day to day maintance part of it(not that i think you will)
do note all in one isnt always all in one. you may end up havign to upgrade parts to get what is really needed to take care of a reef, or you may need to modify things to get the best use out of them. so just go into it knowing all in one doesnt always mean ready for fish or no more money spent. also alot of times you can save money by peicing your own together. its not as hard as it seems. and with people here they can help you compare equipment and make sure you get what you really need.
if you can find zeros build he has a 25 gallon cube. awesome size and awesoem look and not expensive really. get your own equipment and good lighting and you can get anythign you want in it. something you cant always do with all in ones.