TDTA1181

Hello guys. I've been recently considering a possible upgrade to the EcoTech series of controller(s) powerhead. I really don"t know very much a/b these units, at all. I have a 46 gallon tall reef tank and i was wondering what size of the EcoTech units i would need and the benefits of a wireless driver or not? I will one day, have a larger tank, nothing larger than 90 gallons, and would like the EcoTech that could transfer to that tank. I've seen alot of u're tank pics, on here, have these EcoTech units on u're systems. Can I get rid of my other powerheads w/ this product? This is very important for me having a smaller tank. With my tank being deeper will it efficiently move water on the bottom portion of the tank, even close to the top of the sand bed? Where do you place the unit on u're tank? Also, not related to the title i have an Aqua Remora skimmer w/ the 1400 Rio pump with skimmer box and was also thinking of upgrading to the $$$Deltec MCE600 skimmer$$$, both are the HOB skimmers, i have heard noting but good reviews a/b both skimmers but w/ space being an issue all the time w/ my tank the skimmer box on this Remora is very cumbersome, and it just doesn't skim very efficiently w/out it on.