Best CPU for programmer (and photographer)

Some time ago, I've decided to upgrade my PC. I'm not into hardware, but I've read some benchmarks and compared prices.

My machine mostly runs: some IDE like MS VS, Eclipse; some compiler (gcc,cl) and WWW/Sql/SVN/... servers for developing purpose (single user) while foobaar plays my favorite ogg's and truecrypt is protecting my data. Sometimes running 1..2 rather small virtual machines (vmware) is also necessary. Occasionally, I edit my photos with GIMP/Photoshop (rather large 10Mpx files), but performance is welcomed.

I've chosen these candidates:
1a) Intel Core 2 Q9300 Quad Core, 2.5GHz, 1333FSB, 6MB cache, LGA775, 45nm
1b) Intel Core 2 Q9400 Quad Core, 2.66GHz, 1333FSB, 6MB cache, LGA775, 45nm
2) Intel Core 2 Q6700 QuadCore, 2.66GHz, 1066FSB, 8MBCache, LGA775, 65nm
3) Intel Core 2 Duo E8500, 3.16GHz, 1333FSB, 6MB Cache, LGA775, 45nm
4) Quad-Core Intel Xeon E5410 2.33GHz (x4) 2x6MB, FSB1333, LGA771
5) Quad-Core Intel Xeon X3330 2.66GHz (x4) 2x3MB, FSB1333, LGA775

1a/1b depending in performance(didn't find those two in one benchmark)/price ratio(ca. 50$).
2) lower FSB and 65nm but larger cache than 1b
3) only 2 cores but faster clock. Seems to score higher than quads (similar but not the same as above) in general tests.
Q9450 is too expensive for me
I've also taken into account 4) and 5) but read that I shouldn't bother with them. At least the former, 'cause it's 771 socket. The latter is 775 but has less L2 cache.

I think that 4GB of RAM (which? 800MHz?) at start with ability to double its size is optimal choice + some _stable_ mobo.

What could you recommend? What would you advise against?

That double the work is BS

I'd say 50% gain would not be unreasonable for Nehalem in multi threaded applications. For single thread though, it'll be 10%, maybe 15% tops (although the single core overclocking is intriguing).