It doesn't sound like a CV joint problem, but you never know. When my CV joint started to fail, it sounded like a click-click-click or a scrape-scrape-scrape sound when turning the wheel while under acceleration. In my case, it was turning left since it was the left outer CV joint. For you, try accelerating hard while turning right to see if the sound gets worse. Either way, follow the link below to see what a torn outer CV joint boot looks like. Look under your car and check your CV boots for tears. Especially look for spilled grease on the inside of your wheels. If you find LOTS of grease, chances are, you find a torn CV boot. When the joint really decided to fail (after 2K+ miles), the car had a constant rumbling sound at 30 MPH and up, but not a bouncy ride as you describe. So, I hope this helps, check it out and post us on what you find!!! 
http://www.xoutpost.com/x5-e53-forum/...-see-pics.html
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2022 X6///M - Toronto Red, Silverstone Full Merino Leather, Executive Package w/Remote Engine Start, Soft-close doors, Heated & Cooled Cupholders, Front Ventilated Seats, Front & Rear Heated Seats, Front Massaging Seats, Carbon Fiber Trim.
2002 X5 3.0i, Sport Premium, Titanium Silver, Grey Dakota, Cold Weather Pkg, Xenons, DICE, LED Tails, just a winter vehicle...
2007 550i, Sport Premium, Silver Grey Metallic, Grey Dakota, Nav, Cold Weather Pkg, Comfort Access, HD Radio, Xenons.
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