Hey Paedro,
I'm with Cremmerson on the spreadsheet tip.
It is a great tool to use to design your beer within style guidelines and to get your best shot at balancing your ABV and hop bitterness/aroma.
I recently brewed a full extract IPA with spec grains and also the help of Ianh's spreadsheet. It made it easier than just bunging it all together.
I am planning on leaving it to bottle condition for at least 6 weeks, but have to admit I had a sneaky two week tasting last night of one stubby.
I am happy with the results, malty, bitter and ALOT of hop goodness. So there should be as I used 180g of the buggers !!!
Good luck with your brew !!