Welcome Bo! I love your name so much! (have a wonderful cat named Bo!) I know the feeling of spending that kind of $ for a cruise vacation. Like Wendy said, the first one is the hardest to "justify". You're not getting the past cruisers or onboard booking discounts which will follow on later cruises.
Although there are many excellent TA's around, many really aren't Radisson (now Regent) specialists. Please feel free to email me and I'll discuss my findings and comparisons with you. Many of us on this great board use the same great gal! She's the BEST!