You might want to check the build date, or much more specifically, find out which FW your THX is running on, if you care for the THX. Secondary color issues exist with version 1.19, particularly that cyan is pushed too close to blue, the most offensive results being the greens. CNET corroborated this info, as they found blue sky reflected in water to be too dim.
You're probably running current FW. Especially since your Onkyo is working fine too, as they have a specific 1.25 FW to deal with Onkyos HDCP.
Version 1.28 I am led to believe is mostly for VieraCast. Speaking of which, some are updating via VC but there is a lot discussion whether FW is cumulative or not. I dunno. Others might suggest contacting Pana directly for an SD card with updates.
Again, you're probably already fine. I just researched this stuff for my friend who finally has his 65V10 shipped out today.
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Since you did buy a 54V10, I'm assuming you have at least a chunk of change to throw at your video.
If it's only particularly DVD that you are concerned about, I also would go Oppo (ABT), and if you really don't care about SACD, I might even go Denon for Realta if the price point is similar.
If it's for cable, just know there is only so much you can do with crap. If you still want to do what you can with cable signals, your best bet is to invest in an outboard video processor. I would recommend the DVDO Edge as the bare minimum, and from there the sky is the limit.
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for calibration, I'd be pretty apprehensive about letting BB do my cal for me. Do you know what software they will use? What colorimeter, spectroradiometer, if at all? Or are they just going to do something you can do for yourself?
If you want to find a pro, with a good chance of finding recommendations/feedback on any particular pro, sign in here, and run a search function of your city and state.
This list is primarily for Pioneer calibrators who can or cannot install this particular thing for their panels, but I'd be highly surprised if they couldn't adequately calibrate your V10. Anyways, just for reference: