You a playing music in a bedroom and went through six recievers already?
Noted you said "really loud" so if you are blowing 100 watt recievers, you'll need at least a thousand watts to make it twice as loud.
A McIntosh integrated amp won't do it, almost all consumer grade amplifiers will not do that at any price. When you are saying "really loud" I would have to assume rock concert levels or at least trying to blowing up a receiver in a bedroom.
You need high efficiency speakers to get loud, really loud so they are not small, they are not light weight but they will get you there. There are speakers available that will blow your hearing and get those ears ringing at 50 watts so power won't be a factor.
How large is your bedroom? What type of music do you listen to? Do you like strong and deep bass response? How large can the speakers be? Are subs an option? How LOUD is really loud?
Another concept is the amplifiers should have a clip or limiter light to inform you it is tapping out. All amplifiers can and will be overdriven by the volume knob and that will strongly impact their lifespan. There are amplifiers available that protect themselves from you, limit the output to prevent clipping and will bring in fan cooling to prevent them from overheating when required. They are also available with DSP to prevent overdriving the speaker below tuning to protect the woofers (critical on a 2-way) and the limiters can be set to the limits of the speaker to protect it.
The last time they used McIntosh for industrial use was the Beatles in the 60's--great amps but once there was a market for high output, ultra-reliable amplifiers other companies rolled in. Next time you go to an arena concert or IMAX theater, look at the amplifiers they use. They, like you don't have time to screw around with blown up amplifiers.
The ultimate 2-way would be the JBL M2, it has "free amps" that are included at no extra charge--but they run $20K a pair.
If you like modern music and classical, the JTR 215RT looks like a "2-way" with a concentric (2-way mid/tweet) horn and two 15" drivers. Frequency response is 18Hz to 24KHz with power handling at 2,000 watts and it will punch out SPLs in the high 120dB range. Basically, it will blow out the drywall in your room, smoke your ears and break your back when moving the 6 foot tall 215 pound beasts.
If you don't have a size limit and don't need much below 30Hz, the JBL 4722n cinema speaker could be the ticket. It uses two 15" woofers crossing over to a giant horn at 680Hz and will deafen you within 4 meters at less than 100 watts. They run around $3K a pair and throw in something like a Crown XLS2500 amplifier to use the high pass filters to protect the woofers from being overdriven. The Crown runs $600, has balanced XLR/unbalanced RCA inputs, 440 watts per channel into 8 ohms and 775 watts per channel into 4 ohms and is 2 ohm stable.
The audiophiles of the world like to upgrade the mid/high horn on the 4722n with a $300 Be piece to get the best mid/high they can. Always an option for that upgrade if the bug hits. Be aware the 4722n/XLS2500 combo will get close to 130dB each at one meter so if you see the Crown's limiters tapping red, you are about to blow your hearing.
That is about the only 2-way speaker I know of that will get really, really loud, sound outstanding, is upgradable and easily fits your budget. $3500 or less for a pair shipped and the amp. The downside is it's not small, it's not pretty, quite heavy and you'll have to make your own grills. Professional speakers are meant to be hidden behind screens so no effort was made to make them pretty in any way.