My 2 cents:
1. Hyperfirm E-11: awesome detail and lightweight, like a work of art; can be tweaked for even more detail (d-ring, cables, etc).
2. Doopy's: great details, a little heavier, and can be tweaked for your level of detail (paint, weathering, etc).
3. Hasbro/Doopy's Conversion: good started blaster, smaller in size; fun to build and can be fine-tuned with more details.