I can't even figure how a 32" sub would play nicely, even provided that a sub of that magnitude would only handle so little wattage!
Anyway, "destroying" the sound is going to be totally subjective. Some people feel that too much bass automatically ruins good sound, and whatever you're planning, it sounds like it will be more bass than any mids or highs will be able to compete with. If you want a lot of boom, definitely go for a ported or bandpass, and you'll get something that doesn't need a lot of power. TWO bandpass boxes, and you should effectively be blurring your vision. Don't be fooled into buying super high end subs and then throwing them into a bandpass box either. Firstly, putting too much power into a bandpass can blow the sub, and worse, you'll never hear the tell tale blown distortion to know it's screwed up. Secondly, a really nice sub is nice for a reason, it's tight, crisp, and clear, and plays a whole bunch of bass notes. A bandpass is exactly OPPOSITE of this. It's made to boom, boom loud, boom hard, and boom about three notes! It's going to rattle your car and announce your two blocks away when you're pumping your booty rap. It'll also do the same thing when you listen to a low voiced AM radio commercial speaker. So don't be fooled by those guys telling you to put a $250 sub in a bandpass box.
Although good subs can handle more power than they are rated for, it's not a good idea to plan a system in that way. General rule of thumb is to get an amp that will hit an RMS value of around 90% of the speaker RMS handling.
I'll tell you one thing, all that power is nice, but if you want more bass, it's always best to get more woofers than more power. When I started out, I had two tens and two 12s, all hooked up to no more than 160 watts RMS TOTAL. That's like 40 watts per sub, but it got really loud. I now only have two 12s running at least 700 watts RMS, and really I don't think it's as "bassy". It's a long discussion, but basically, it's that power versus the sound is "logarithmic" in function. That means it's really easy to get your 89.9 db from the first watt of power (the sensitivity rating) but the next few decibels up are going to cost you a lot more power, and even more decibels above that will require WAY more power. It's not what you'd expect - you won't double bass by doubling power, this is a common beginner misconception, which I made early on; that's why people who compete in bass competitions are paying in blood. They're stuffing in more woofers and a ton more power to get that extra 1 decibel to be world champion.
Even with just the bass I'm running now, it rattles my moonroof when it's screwed down tightly, and it makes the sound suck. There's no amount of Dynamat that will cure a rattling glass moonroof.
What you're considering is going to cost a lot of money unless you buy cheap stuff. I'd recommend toning it down first, maybe 150-200 watts per sub and some tens or 12s. Most of the woofers on the market only play between 125 - 250 RMS watts anyway. So I'd assume that means that companies are doing something right, and that woofers that handle more than that are usually overkill. Anyone who wants more bass than that is usually adding more subs rather than more power. That way if it's enough for you, then great, you saved money. If it's not, then hey you can save up more and add that second amp and 2 more subs later on. But at least for the time being, you had SOMETHING, and it's all nice, reliable, name brand equipment. It would suck to save up for so long, buy all this cheaper equipment, and not like it, or even more to save up A LOT for great equipment, and to find out that you overbought and won't even play it to its limits.
Start out small, but definitely start out with something that will grow if you want it to. Like buy two nice subs. Then if you want more bass, you can add two more nice ones. If you buy two cheap ones, and still want more bass, you'll probably end up buying two nicer ones and the cheap ones will be sitting in you room gathering dust. It'll save you lots of money.
Sorry for the long post...
Jon
