Cascade, on Feb 25 2009, 06:11 PM, said:
If I have a six-card suit and I belong in that suit I would rather play the contract having not mentioned my second suit. Of course in the bidding you do not yet know where you belong so you have to make some sort of compromise between helping partner choose the best strain and depriving the opponents of information.
There is more than strain to consider. Even if you end up playing in the first suit, bidding the second suit will aid in partner's evaluation. For example if you open 1♠ and then bid a second suit and partner has a 10 count with xxx of the second suit, he may make an accurate decision to go back to 2♠ rather than if you had simply rebid the spades that he might have raised to 3♠.
So if you belong in the second suit you certainly want to bid it, and if you belong in the first suit you may or may not want to bid the second suit. That creates a strong case for generally bidding the second suit, though I could understand an exception for the OP's hand based on suit quality.