Matt think about this idea!
Matt,
Here is my recommendation. PartsExpress has the 15" version of the 12" coaxial Selenium 12CO1P drivers that I bought to put in my full range front horns. This 15", 15CO1P uses the exact same woofer engine and 2" titanium ferrofluid damped/cooled HF compression driver as my speaker except has a 15" cone. These are on sale until the end of this month. See
http://www.partsexpress.com/webpage.cfm?&DID=7&WebPage_ID=145&promo=15
They come with a good crossover already mounted on the speaker so you will be all set. The crossover can be changed later if you want, or they can be bi-amped. You have options.
These are 96 dB efficient and you could put them in a simple bass reflex cabinet just like Altec did with their legendary 604 coaxial.
The only thing is whether or not you will like the sound of a compression driver on the top of a two way. I do.
I see you mentioned some Hi-Fi store in Toronto, so you must be in the area. If you want to come to my place and hear what these drivers sound like I could give you a demo. I am totally convinced that these Seleniums are a totally fabulous bargoon for the dough, and especially so when on sale. By the time you pay dollar conversion and duties, taxes and shipping, etc, these will be $500 CDN for the pair. Another $100 or less for cabinet materials ( 3/4 inch MDF is only $28.00 CDN a sheet) ,
and you will have a great set of studio monitors that will work great with a lo power SET amp. You can also drive the snot out of them safely because they are tested at 250 watts RMS pink noise for 2 hours. These are tough!
Send me private email if interested. I'm just over an hour's drive from TO.
Rob