Strong current is the key to keep it calm (not completely calm it down but less head/face slam into the tank glass), if you have right setup then its hardy fish and of course you will love it along with its progression. The main reason I sold mine is tank size and space, I can't have a tank that bigger than 150G. About the price tag it's all depend from LFS to other area LFS, I got mine for $125 but that 18 months ago and I knew and got very well relationship with all my fish stores within 25 miles radius from my house. Oh, for the water flow I got over 10k GPH in my 150G...it's a hurricane going in there but it's nothing for my GATF and its love it
PS: Setup your tank at least 6 weeks before adding any fishes. I'm usually setupa newtank and got some feeders in there for few months before I add my favorite fish (while waiting I use that time to research and decide which fish I'm gonna get

it's a long term hobby so no need to rush then fail and quit)