[ltp] What is the fastest Thinkpad I can get now?

[John Jason Jordan]

I have a T61 with 2 GHz Intel dual core, 320 GB SATA-2 hard drive
(replaced the original 160 GB drive) and 4 GB of RAM. It's not fast
enough.

I do a lot of desktop publishing for print on Fedora 11 x86_64. I
currently have Scribus open and it is using 2.2 GB of RAM. System
Monitor tells me the total RAM usage at the moment is 3.4 GB (adding
other open applications). On occasion I am swapping to disk. I'd add
RAM, but my T61 is maxed out at 4 GB. 

I also need a faster CPU. Exporting to PDF from Scribus sometimes takes
half an hour and longer. I don't care if it's Intel or AMD, just so it
is fast. Of course, there are other issues that impinge on speed of
CPU, like bus speed, etc. I don't care what it takes, I just want
processing speed.

I love the 15.4 inch screen at 1680 x 1050 on my T61, and want my next
computer to have the same resolution, and I prefer nVidia graphics.

So what is the most powerful Thinkpad I can get today?