@closerfan12 -- Congrats on getting married -- and you are totally right to milk this opportunity to get a lot of expensive kitchen stuff ;)
I can't really help you as far as a brand or anything because I actually use a commercial chocolate tempering machine (the patisserie next to me was going out of business so I got it cheap!) but I have heard good things about both brands of chocolate tempering machine -- Revolation and ACMC -- that you mentioned.
Maybe you could get a demonstration with one of them? It depends on where you buy it from, but sometimes you can get the retailer to let you see it work first. Other than that, my only advice is to choose whichever one looks nicer, since you'll be using it a lot and don't want to look at something ugly.
Best of luck!