I knit between the sizes, but I really wish I had gone with the s and then just added more increases for the bust. It's somewhat wide at the bottom bit right now. I guess this will make it wearable in winter, though.
Details: Talia by SweaterBabe from Knitty Spring 2008. Knit on 5mm in one piece and then sewed shoulder seams and knit the armhole and neckline edging. 7 skeins of Lana Grossa Bingo, purchased in Wollstübl', Heidelberg. I used up all the yarn, there's not even a bit left. This took only two weeks to knit 'coz I had loads of time on the drive to the airport. (I was on a short visit to Lithuania last weekend.)