See, I've tried the Google Voice thing. It doesn't work, because I've been in the business for five years already and have an established client base that has my current phone number. So even if I pass out my new GV number and get business cards with the new number (which I already tried doing), my past clients still call my original number, and they've passed on my phone number to their friends (which I am VERY happy about!

That means I've done a good job and they want to share that with their friends!!) But that original number is the one being passed on, NOT the Google Voice #.
I once had a past client from two years ago pass out my old number to three of her friends who purchased homes this year. That is AWESOME, but again - the transition to Google Voice just did NOT happen. My emails had the GV number, the business cards, all my stationary...but because I started off with the original number, I have to keep it.
I guess, in theory, the Google Voice option would work if I was brand new starting off in this business. But since I have about 100 past clients who have my current number, it's very difficult to make that transition.
The easiest thing to do, in my perspective, is to simply make my current BlackBerry Bold a "work/business" phone, and then create a new number with a new phone and share that with only my girlfriend and one or two friends. That way, if I need to unplug or just have a night out with the girlfriend, I can just take the other phone with me for emergency purposes but not be caught off-guard or distracted with phone calls and emails.
It's just...I agree that it sucks to carry two phones, and also, I'm on Verizon, which means the cost is going to be ridiculous. I don't have to be on VZW for the second line; I could get a Boost or Virgin BlackBerry Curve as the "personal" phone.
Any thoughts, ideas, different perspectives? Anything will help, guys! I'm just thinking out loud here...trying to figure out a way to separate personal and business without making it a hassle.
I appreciate all your help!!