My Preferences
If gen:
1. 64c (La Bomba) - But they are already in the $8-10k range
2. 87d,e (Light blue dial, no bezel surrounds) Buyable in the $5500 range
3. 87 F... (Dark blue dial. WG bezel surrounds). Same price
4. 243 Pretty watch but prices are sinking like a stone. Can buy in high $6's already. That one will be priced like 87's in no time though.
If Rep:
1. 243 with proper He engraving. Crown is good but CG is suspect. Too much movement in bezel but still the best
2. 87 (d,e) I am told dial is correct color but have never seen. Horrible crown though
3. 64 Same crown issue as 87 and wrong bezel markings to boot. Although you can always tell folks you needed a replacement bezel as you get an 87 bezel if you send in your 64 to Panerai for service.