I like the rimless tanks. Here are some options I was looking at...
ADA 45-F (5g?) or 60-F (9g)
excellent workmanship, low iron glass, Pisces in Calgary just started carrying ADA
http://www.nano-reef.com/forums/inde...owtopic=256577
http://www.youtube.com/watch?v=z5MqxHR7sHI
http://www.adana-usa.com/index.php?m...roducts_id=277
Ecoxotic EcoPico (5g)
http://www.ecoxotic.com/ecopico-aquarium.html
http://www.3reef.com/forums/show-off...108540-17.html
Concept Aquatics in Calgary makes custom tanks
I went this route and am happy with the results, though it isn't as good as the ADA tanks I've seen pictures of.
http://www.conceptaquatics.ca/
Hagen (5g)
black silicone if you like that look
http://www.petcetera.ca/Products/Fis...arium-18L.aspx
My preference was to look for a glass tank. Acrylic scratches too easily, though the PicO aquariums are really nice. There are several build threads on nano-reef with those tanks.