Well, for what it's worth I left work early today and spent two hours at a great aquarium shop in Randallstown, MD (RTR is probably familiar with it). Tallest aquarium they had was 28" (150 gallon 72 x 18 x 28). It was on a rather high stand, but I could actually reach inside and touch the bottom of the glass closest to me, without 3" or so of substrate, of course. Accessing more remote parts of the tank would be more of a chore although I am certainly not unwilling to use a step ladder or use forceps / planting tools.
However, the 155 gallon bowfront AGA (72 x 24 x 24
http://www.reefmaniac.com/) was very very tempting indeed, and perhaps the best way to go . . . eventually. It's definitely a $2000 startup cost, bare minimum. They used to carry the Tenecor tanks which Harry mentioned (and which I had also considered
http://www.tenecor.com/bowfront.php) but stopped doing so as customers found them more cost prohibitive. The 155 AGA bowfront was 360 lbs (tank only). Not sure how much lighter acrylic would be. The potential for acrylic to scratch is somewhat disuasive to me. Not sure how easy it really is to remove such scratches.
Anyway, much to think about here. As interested in this as I truly am, it is not unlikely that my work could post me overseas for a couple of years. Not that I would regret the purchase, but the takedown / storage / and investment loss with fish and plants would be a pain in the neck. It may be wise to let the yuppie lifestyle stabilize first. But it is
SO tempting . . .