Hi @Ew35,
I'm a massive Star Wars fan, and this has followed into the LEGO World. Now, my favourite set, I'm not quite sure. My wife bought me the Ulimate LEGO Star Wars guide for Xmas, and after flicking through each page, it's quite difficult to distinguish what my favourite is.
I too am building a collection, and I've recently done what you've said. I've had my eye on a set (or half the set) for quite some time now, but just can't jusitfy the price tag so...
1. I sourced the instructions and parts on Rebrickable.
2. Imported the parts list into Bricklink.
3. Sorted the parts on what I needed, and ordered up.
4. Parts arrived.
The image below should give it away.
I've almost completed the build, so I'll post up finished images soon!