18's are about 24.5lbs-25lbs depending on the width.
The comparable BBS wheel would be a CH however BBS uses lower pressure casting so they are a bit denser and stronger, but also much more expensive. DPE and HRE are forged 1, 2 and 3 piece wheels, they are in a completely different league in terms of price and quality.
VMRs are designed to be driven daily and put through their paces so they are more than capable for most applications including track cars and daily drivers. They are one of our most popular wheel lines for a reason, they are proven quality and value.