Did you say 80-100K american dollars? That's a big budget. If I was spending that kind of money I would be contacting the manufacturers and letting them fly me to the facility to check out what they have and how its made....
First- Can you post a picture of the room this system is going in?
Next, for heavy metal music, I would say you don't need to spend that much, and honestly the more you spend the less you are probably going to like it. See with high end systems, clear and loud is possible, but HM IMO sounds best on pro equipment.
The ultimate Heavy metal gear to me would be- a pair of Cerwin Vega XLS215's
http://www.amazon.com/Cerwin-Vega-X...1392376126&sr=8-1&keywords=cerwin+vega+xls215 with an xls2500 amplifier
Amazon.com : Crown NXLS2500-0-US Power Amplifier : Musical Instruments , and if you want to get really crazy cross the 215's at 50 hz and use a pair of subs for the low end. And with the subs the sky is the limit
18.0 Subwoofer - Funk Audio 18.3 Subwoofer - Funk Audio or if you want to get really crazy JL audio has some sick stuff too... But for my money I would pair the xls215's with a pair of svs ultras....
Thats about the best you are going to get for metal sound... I know the cerwins vegas aren't very attractive, but they will sound the best IMO...
If I were building a LOUD clear system for rock music {I am not crazy about heavy metal} and I couldn't fit or talk my wife into the xls215's, I would go with...
T13 crossed at 70 hz powered by an Emotiva XPA2 and a set of
Dual SB13-Ultra , I would use the Emotiva XSP1 as a preamp you could buy that entire system with cables and a stand for around $7500.... It will be more aesthetically pleasing than the cerwins, and my Tekton Lores Scream, they sound awesome with live tracks, the loudest music I listen to is probably Bruce, lol and it sounds awesome through the lores...
The pendragons will handle 200w the xpa2 has 300 so you will have plenty of headroom but with the pens efficiency 200 watts would mean ear bleeding levels since they make 98db with a single watt!!! Couple that with the fact you will cross the pens at 70-80hz and be letting the subs handle the hard to power lows, that system would be so LOUD and clear, I can't picture getting much better...
As far as your budget goes, I think its silly to spend that much on anything with out 4 wheels or a foundation so I won't be a good member to get a recommendation for that kind of budget, but I would bet real money a blind test between what I posted above and what ever you find for 100K will not sound 10-12 times better if at all with metal music since it is one of the only genres that I think needs a separate speaker to sound good, I know with my evo towers metal is not rite, they can't get loud enough and there is something missing.. Its not like you need a perfect refined system for critical listening to appreciate the vocals, smoothness of a saxophone, or crispness of a cymbal, you just need loud, fast, and clear...