If I was in the market for the "ultimate" body only sigelei V5 deal I would look for one with brushed stainless steel finish, flat top style, vented top cap, one each of short and long battery caps, machined stainless steel button and laser etched sigelei and CE logos.
Except for the two battery caps, fasttech was selling at least some V5s like this a few months ago. I don't know if they are selling them now or not.
Varitube claims to feature the metal button on their V3 but don't say anything about laser etched logos or two battery caps.
If I were Sigelei the only improvements I would make to future V3 and V5 models would be addition of a bushing or spacer between the circuit boards and top cap to prevent any possible circuit board movement and replacing the current control switch with the more durable Omron switch. The Omron switch is made in China, as it happens.
Except for the two battery caps, fasttech was selling at least some V5s like this a few months ago. I don't know if they are selling them now or not.
Varitube claims to feature the metal button on their V3 but don't say anything about laser etched logos or two battery caps.
If I were Sigelei the only improvements I would make to future V3 and V5 models would be addition of a bushing or spacer between the circuit boards and top cap to prevent any possible circuit board movement and replacing the current control switch with the more durable Omron switch. The Omron switch is made in China, as it happens.