[firechief]

If we're playing 2/1, I'd splinter with 3 diamonds. I'm biased because this hand type has come up several times in my experience, and every time it's been right to splinter. The fact is that this hand has a lot that needs to get described. We have a potential strain in spades, we have a great club fit, and we have both red suit first round controls. If I start with 2s, I'm afraid I'll lose some of the emphasis on my club support/red suit controls, since the auction will get crowded in a hurry. With the 3d bid, we have an easy heart Q-bid next round, and partner will have a very good idea of what our hand is like. Incidentally, splintering doesn't show extra values, it's merely a description of your hand. The description is 4 card support and short diamonds. However, if the splinter did show extras, this hand would still be applicable (huge hand in support of clubs). If partner produces a 3nt bid over this, I'll bid 4s, which will show the 6th spade.
Joel