I have done alot of research on this subject. and hands down the ACIII is the best out, not to mention it can be run via iphone or ipod touch that option is worth its weight in gold. to beable to go on vacation and feed your fish or if the temp gets to high to control fans and lights with a simple app is fantastic. i will be back on the road soon and this is the first thing i will get, even if it was 600 bucks i would still get it. not to mention you can code your own f/w for it. sure you can get the RF and vpn into your home system and control everything but that means you have to always carry a PC with you. and at any givin time you cant just hit an app and look at your full setup. right now when i go away for a day or 2 i can turn on my webcam via my iphone and look at my tank but its going to be great to look at it and be able to control it too. just my .02
Matt