Looking good. I would grab a E7300 and 4GB of RAM. I'd get 1066 MHz ram, too.. You wont notice any big difference between 800MHz and 1066MHz, though. I would still recommend of getting 4GB of RAM even you currently have 32bit OS.
Check out this shop as it is located in Germany
Hardwareversand.de
There you could get same stuff than in your post but E7300 & 4GB 1066 MHz RAM for ~400€.
Antec Three Hundred 54,61 €
Gigabyte GA-EP45-DS3L, Intel P45 92,47 €
Intel Core 2 Duo E7300 108,17 €
Xigmatek HDT-RS1283 Heatpipe Cooler - Red Scorpion Edition 33,44 €
4096MB-Kit OCZ PC2-8500 Platinum, CL5 55,82 €
Samsung HD502IJ, 500GB, 16MB 57,83 €
=402,34 €

Check out this shop as it is located in Germany

Hardwareversand.de
There you could get same stuff than in your post but E7300 & 4GB 1066 MHz RAM for ~400€.
Antec Three Hundred 54,61 €
Gigabyte GA-EP45-DS3L, Intel P45 92,47 €
Intel Core 2 Duo E7300 108,17 €
Xigmatek HDT-RS1283 Heatpipe Cooler - Red Scorpion Edition 33,44 €
4096MB-Kit OCZ PC2-8500 Platinum, CL5 55,82 €
Samsung HD502IJ, 500GB, 16MB 57,83 €
=402,34 €