Here is a site reffering to the differences of CRT and LCD:cheese:
http://computer.howstuffworks.com/monitor9.htm
Now for the mx you asked what is better, well the lower the ms (Responce Rate) the easier on your eyes, were higher is the opposite, so hopefully that answeres that question.
Refering to stats for a LCD, its totally up to you, as long as you no what everything means when you are buying a monitor just go for what you like. Here is a link to a monitor that has great reviews.
http://ostg.pricegrabber.com/rating_getprodrev.php/product_id=9023019/id_type=M
Dell monitors can be just as good as some, can be better or worse. Its all about what you like, and your oppinion. If they seem pricey to you then search for a monitor cheaper of Dell if you like Dell, or search around for other brand names. For me I have have Perfect results with Samsung 😊 .
I wont push towards any style of monitor so ill list some monitors of CRT and LCD, so im not being an unnfair advantage to anyone. Also they are in the price range you listed.
Here are some more sites for monitors in Canada:
LCD’s:
http://www.ncix.com/products/index.php?sku=15225&vpn=L1780Q&manufacture=LG Electronics
http://www.ncix.com/products/index.php?sku=15853&vpn=LS17DEPQAQ/XAA&manufacture=Samsung
http://www.canadacomputers.com/index.php?do=ShowProduct&cmd=pd&pid=008927&cid=MT.899
http://www.canadacomputers.com/index.php?do=ShowProduct&cmd=pd&pid=007784&cid=MT.983
CRT’s
http://www.canadacomputers.com/index.php?do=ShowProduct&cmd=pd&pid=008883&cid=MT.37
http://www.ncix.com/products/index.php?sku=6909&vpn=E90F&manufacture=ViewSonic#CustomerReviews
http://www.ncix.com/products/index.php?sku=15618&vpn=LH19ISBBHQ&manufacture=Samsung#CustomerReviews
http://www.superwarehouse.com/Samsung_SyncMaster_997MB_19_CRT_Monitor/997MB/p/623411 <——*Not sure about Canadian Pricing*
Hopefully some of thise information helped, if you have any further questions just ask, my ears and im sure many others are open to help you out 😊
Have a Great Day!