I see that this thread is a bit out of date. There are actually quite a few more Raphael/other Device radios available at this time. They are all posted in that XDA thread, but here's a list of them:
Raphael Radios:
1.12.25.19 - Raphael Radio from AT&T Test ROM (03-01-09)
1.14.25.05 - Raphael Radio from O2 UK ROM (04-13-09)
1.14.25.35 - Newest Raphael Radio from Official HTC AT&T ROM Update (06-04-09)
Other Device Radios:
Blackstone Radio 1.12.25.16 |
Mirror
Blackstone Radio 1.13.25.24 | Mirror
Blackstone Radio 1.14.25.24 | Mirror 23 April 2009
Quartz Radio 1.12.25.WSD 3 May 2009
Xperia Radio 1.14.25.55
Diamond Radio 1.15.25.14 06/16/09
Xperia Radio 1.16.25.48 4th July 2009
BlackStone Radio 1.17.25.09 | Mirror (Newest) 16 September 2009
I used the 1.14.25.35 Raphael Radio for quite a while, as I'm on AT&T, but after Security Unlocking, I've found the Blackstone Radios to be the best for me, reception-wise. I'm currently using the 1.17.25.09 Radio, and my reception has improved all around.