First,
welcome to the forum, Simon!
I am absolutely confident that you will find this forum a both friendly and also a very useful place to spend some time.
Before starting to post, however, I also believe that you would benefit from reading the threads in the:
READ ME FIRST FAQ then post section. Furthermore, there are two annoncements at the top of this
Marketplace which you may also want to read.
If I was in your position (looking for one of these fantastic ThinkPads!), I would really first hang around for a long while in the
ThinkPad T6x Series forum - and there picking up some basic (and some advanced!) information and whatever wisdom you run into there. From your post here, it appears to me that you have not - in my honest opinion! - really spent that much time to consider what you really want (since there are e.g. no T61's with FlexView/IPS at all, and there are also no 15.4" widescreen ThinkPad's with FlexView/IPS - at all). May I also kindly suggest that you read the thread:
LCDs on T60/T60p - types, availability and other discussions? Finally, please allow me to suggest that you have a look in the famous
tabook ("Personal Systems Reference Lenovo ThinkPad Notebooks")... you'll find a link to it in the thread
T4X specs; see the post of Jan 28, 2007 1:01 pm. In the
tabook you will find specifications on e.g. T60/p's and T61/p's available today. Have a thorough look there - and then think a little more about what YOU really ddream abou. Then, when you're a full ThinkPad T60/T61 expert

then you're ready to go spend your hard-earned money. But... take a little deeper look on your own, first.
In conclusion, prepare yourself to become a happy THinkPad'er!
Best regards,
Johan