Didn't know you could buy Box bareroot - its up to you really, the difference is simple - bare root should not be purchased or planted before October, preferably late October, and should be planted immediately into pre prepared area and watered thoroughly. Container plants can be bought any time and planted now, if you want, as long as you're prepared to keep them watered until winter comes.

It will also depend on your budget - bare rooted will always be cheaper than potted. Have a look at www.hedging.co.uk - they sell both. I remember Geoff Hamilton used to swear by bare-rooted saying they established quicker. He also used to grow his own from cuttings.

Bare root, to save quite a bit of money. Available form mid-late Oct. 20cm or so in height, seven or eight per metre for a dense low hedge (parterre style), and feed in mid spring next year. Perhaps a light clip in June/July next year, and another feed, and don't forget water in dry spells, especially while they're getting extablished (first year). How tall will you want them to be?
Phil J