I see what you're saying but here is it from my POV:
Coming from a BlackBerry 9630 that I've had 2 years the HTC Thunderbolt is a huge upgrade for me. I'm not coming from a Dinc or EVO or DX. This will be my first Android
It's not duel core but from what I've been reading the duel core shines for gaming. I'm not a gamer at all. I can wait 2 years to get duel core when there are new ones out.
I like the look of Sense UI over blur, the HTC seems to get updates nicely and HTCSense.com support appeals to me. I will root it but I'll never load a custom ROM. I never loaded leaked or unoffical OSs on my BlackBerry. Mainly because I don't have a PC.
Ok, and the TB is releasing before Bionic. I'm just so tired of my BlackBerry!
From what you said here, just go with your gut and get the Bolt, I'm sure it'll be a great phone and I'm sure it'll serve every purpose you want in a phone. Plus, in my opinion, it looks pretty damn cool.
I definitely wouldn't get an X right now on contract, and it's looking like you'll only be waiting at most 3 weeks-ish for the Bolt. I don't do much gaming, either, so the dual core doesn't do much for me, but I've kinda become a bit of a fanboy for Moto after my X, so I'll probably upgrade to a Bionic this summer. I'll probably check out some other new stuff in the 4G Android arena, especially with there being so much of it on the horizon, but I'm betting I'll end up with the Bionic (I only do 1 Year contracts anyway, so I get new phones every 10 months).
My area is on the list of VZW's 4G 2011 plan, but who knows if that'll happen, and who knows if I'll be too cheap to pay for the 4G service.
Back to your question and thought, again, go with your gut, get the Bolt if that's what you want. It'll be LIGHTYEARS ahead of your Tour.