The E6300 is quite a slow animal.
The Conroe is a bit of a hype now. And claiming all Conroes are fast is nonsense.
Rather go for a E6600 if you can afford one.
If you don't want to overclock btw, the Athlon 64 X2 5000+ is a very good option.
Here in the Netherlands it cost 280 euro's and it runs par with the E6700.