Can buy one or more. Max I just want to make sure they will sound good with my Rotel 1603 receiver. I don't want to buy them and find out there not going to work well. And that I would have been better off with reg speakers.
Depends on what you're doing with them. Think about how it sounds, when you go to a movie. The goal of those horns, is to make sure everyone, in every seat hears the dialogue clearly... what's the point of going to a movie, if you can't hear what's going on? Those compression drivers will do this way better than dome tweeters in a domestic speaker. Similarly, those woofers are going to have impact, and make everything sound loud and exciting.
The down side, is going to be that they will be overpoweringly large for a normal room, and they are not going to appeal visually to anyone but a die hard audio or theater nut. They look big already in that big room, but once you get them into your own room, they will be enormous, not just big, and you can probably anticipate/expect spousal disapproval. Also, they aren't going to be as flat as domestic speakers, and you may feel the horns are shouting at you, and the bass doesn't go low enough for the size of the cabinets. The woofers which usually are well protected by the movie theater screen, are hanging out there vulnerable, so will not be compatible with small children or pets... so both "unsightly" and delicate at once.. can be lose lose from the perspective of domestic harmony.
Can you spend $300 on something else and get better sound? Well, that depends on how you define better sound. I would jump at this opportunity, but then that's me, this is the sort of thing I like, and I know that.
Is it possible to bring your receiver and say an iPod to the place the guy is selling them, and hook them up to try? Tell him you want to check that they work. Trying them is really the only way to know if they're for you or not.
If you're second guessing the idea before even bringing them home, I kind of have a hunch you may well be happier with bookshelf or tower speakers, rather than venturing into movie theater sound land.