My only comment is that I'd try and work some amber malt into the recipe, but that's just me. I love amber malt in a brown ale.
I've brewed several batches of NB's Surly Bender AG kit, it's a great beer that's really set apart by the special B and amber malt. (If memory serves correctly.)
Briess may not make as good an amber as others, but it's still worth it IMO. I think theirs is victory?