Overtons are great - I have a high D which is real nice but it takes a fair bit of puff. Quite an ambitious (not to mention pricey) choice for a first whistle but if you've got the cash, why the hell not? If you're playing a lot in sessions with singers, you'll need to get a few whistles in different keys. You can buy cheap Generations and Susatos n keys like C, Bb, Eb, and F, rather than spending loads. Definitely try Mike Burke - tone wise his are the best whistles I've ever played - and they're if anything cheaper than Overtons. Good luck. m.d.